[pitivi] help: Add section ids



commit c1be291fbd6b19a448da81f8ecbf744f54a7bfbf
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Sun Jun 5 17:44:46 2016 +0200

    help: Add section ids
    
    Differential Revision: https://phabricator.freedesktop.org/D1060

 help/C/about.page              |    4 ++--
 help/C/cheatsheet.page         |    6 +++---
 help/C/effects.page            |    4 ++--
 help/C/gstreamer.page          |    6 +++---
 help/C/importing.page          |    4 ++--
 help/C/keyframecurves.page     |    2 +-
 help/C/layers.page             |    8 ++++----
 help/C/mainwindow.page         |   16 ++++++++--------
 help/C/medialibrary.page       |   12 ++++++------
 help/C/movearoundtimeline.page |    8 ++++----
 help/C/presets.page            |    4 ++--
 help/C/rendering.page          |    2 +-
 help/C/selectiongrouping.page  |    2 +-
 help/C/transitions.page        |    4 ++--
 help/C/trimming.page           |    2 +-
 help/C/usingclips.page         |    6 +++---
 help/C/usingeffects.page       |    4 ++--
 help/C/workwithprojects.page   |    6 +++---
 18 files changed, 50 insertions(+), 50 deletions(-)
---
diff --git a/help/C/about.page b/help/C/about.page
index da5884a..113b605 100644
--- a/help/C/about.page
+++ b/help/C/about.page
@@ -24,13 +24,13 @@
 
   <title>About this manual</title>
    <p>This user manual is written and maintained by Jean-François Fortin Tam.</p>
-   <section>
+   <section id="wip">
     <title>Work in progress</title>
      <p>You may encounter unwritten portions due to features that have not yet been implemented in Pitivi at 
the time of writing.</p>
      <p>You may also encounter smaller areas which have been documented in this manual but have not been 
implemented in Pitivi – those are areas where the design and expected user interaction are quite 
narrow/certain.</p>
    </section>
 
-   <section>
+   <section id="patches">
     <title>Patches welcome</title>
      <p>If you happen to find errors, missing information or unclear passages in this manual, please feel 
free to submit corrections. You can find contact information on <link href="http://jeff.ecchi.ca/";>my 
personal website</link>. You can also <link 
href="https://phabricator.freedesktop.org/maniphest/task/create/?projects=pitivi,pitivi_documentation";>file 
bugs in our bug tracker</link>.</p>
    </section>
diff --git a/help/C/cheatsheet.page b/help/C/cheatsheet.page
index 25df6ef..b1cca91 100644
--- a/help/C/cheatsheet.page
+++ b/help/C/cheatsheet.page
@@ -20,7 +20,7 @@
 
     <p>This page is a list of important shortcuts to access commonly used or hidden features. Take the time 
to get familiar with them as they will improve your productivity tremendously.</p>
 
-    <section>
+    <section id="general">
       <title>General</title>
         <list>
           <item><p><keyseq><key>Ctrl</key><key>N</key></keyseq>: Create a new project</p></item>
@@ -34,7 +34,7 @@
         </list>
     </section>
 
-    <section>
+    <section id="medialibrary">
       <title>Media Library</title>
         <list>
           <item><p><key>Enter</key>: Preview (playback) the selected clip</p></item>
@@ -43,7 +43,7 @@
         </list>
     </section>
 
-    <section>
+    <section id="timeline">
       <title>Timeline</title>
         <list>
           <item><p><key>Spacebar</key>: Toggle playback.</p></item>
diff --git a/help/C/effects.page b/help/C/effects.page
index f11506b..96860c9 100644
--- a/help/C/effects.page
+++ b/help/C/effects.page
@@ -26,7 +26,7 @@
       <p>Effects are non-destructive: they are only applied to the resulting rendered movie and do not 
affect your source files.</p>
      </note>
 
-    <section>
+    <section id="adding">
         <title>Adding and removing effects to clips</title>
         <p>To add an effect:</p>
         <steps>
@@ -40,7 +40,7 @@
             <item><p>Click the <gui>Remove effect</gui> button</p></item>
         </steps>
     </section>
-    <section>
+    <section id="toggling">
         <title>Toggling effects</title>
         <p>If you want to temporarily disable an effect (to compare with and without the effect, or for 
performance reasons), click the corresponding checkbox in the <guiseq><gui>middle pane</gui><gui>Clip 
configuration</gui> <gui>Effects</gui></guiseq>.</p>
     </section>
diff --git a/help/C/gstreamer.page b/help/C/gstreamer.page
index 1eae726..ed2ba49 100644
--- a/help/C/gstreamer.page
+++ b/help/C/gstreamer.page
@@ -40,12 +40,12 @@
          <p>To maximize <app>Pitivi</app>'s capabilities and reduce the possibilities of bugs, a very recent 
version of <app>GStreamer</app> is recommended. This is because <app>Pitivi</app> developers work hard on 
fixing problems directly in <app>GStreamer</app> instead of putting temporary workarounds inside 
<app>Pitivi</app>.</p>
      </note>
 
-    <section>
+    <section id="friendlycodecs">
      <title>A word about editing-friendly codecs</title>
       <p>Some formats, like <em>MPEG</em>, are oriented towards playback only, and do not compress each 
frame independently. While it is the goal of <app>Pitivi</app> to support working with these files, certain 
operations (like rapid seeking) will not perform as well as they would with frame-independent compressed 
video (such as <em>MJPEG</em> or <em>DV</em>).</p>
     </section>
 
-    <section>
+    <section id="goodbadugly">
      <title>The Good, the Bad and the Ugly</title>
       <p><app>GStreamer</app> plugins come into three categories: good, bad and ugly. You may need to 
install plugins from any category to ensure compatibility with your media files. Whether or not you install 
them is up to you, and may depend on your country's jurisdiction regarding software patents. An overview of 
gstreamer plugins and their classification into categories can be found on the <link 
href="http://gstreamer.freedesktop.org/documentation/plugins.html";>Gstreamer website</link>.</p>
         <list>
@@ -59,7 +59,7 @@
       <p></p>
     </section>
 
-    <section>
+    <section id="imageformats">
         <title>Image file formats</title>
         <p>While it is not feasible to list every possible combination of supported video or audio formats, 
it is however possible to list the static image formats that can be imported: JPEG, PNG, JPEG 2000, PNM and 
SVG.</p>
         <!-- Note: this is obtained by doing:
diff --git a/help/C/importing.page b/help/C/importing.page
index 464d825..43b8a0c 100644
--- a/help/C/importing.page
+++ b/help/C/importing.page
@@ -34,12 +34,12 @@
         <p>Due to our limited resources and the rapid evolution of filmmaking hardware in the past few 
years, and to ensure <app>Pitivi</app> remains robust and simple to use, we do not attempt to support every 
possible hardware device out there. As a result, you currently cannot use <app>Pitivi</app> to capture 
directly from a camcorder; specialized applications are better suited for this task. For example, for DV/HDV 
camcorders using an IEEE 1394 connection, you may use <app>Kino</app> or <app>dvgrab</app> to capture 
footage.</p>
     </note>
 
-      <section>
+      <section id="filechooser">
        <title>Importing files using the file chooser</title>
          <p>You can import media into the <gui>Media Library</gui> by using the file chooser dialog, which 
has the advantage of letting you preview the files you want to import. To do so, use the <gui>Import</gui> 
button in the <gui>Media Library</gui> header.</p>
          <p>A file chooser dialog window will appear. You can press <key>Ctrl</key> or <key>Shift</key> to 
select multiple files at the same time.</p>
        </section>
-       <section>
+       <section id="dragdrop">
         <title>Importing files using drag and drop</title>
          <p>The concept of drag and drop is a well-established method of bridging the gap between software 
applications. Simply select the files you want to import in another application (such as a file manager or a 
multimedia app) and drag them with your mouse onto <app>Pitivi</app>'s <gui>Media Library</gui>.</p>
          <p>This feature can be used to:</p>
diff --git a/help/C/keyframecurves.page b/help/C/keyframecurves.page
index 2252b66..e50ea48 100644
--- a/help/C/keyframecurves.page
+++ b/help/C/keyframecurves.page
@@ -48,7 +48,7 @@
      <note style="tip"><p>You can create fade-in and fade-out transitions by controlling opacity and volume. 
See an example in the <link xref="transitions#fades">Transitions</link> page.</p></note>
      <p>Besides volume and alpha, you can use keyframes to control effect properties. See the <link 
xref="usingeffects#keyframes">Using effects</link> page for details.</p>
 
-     <section>
+     <section id="usage">
       <title>General usage</title>
       <p>The start and end keyframes are fixed to the start and end points of the clip and cannot be 
removed. The curve between these two keyframes is initially a flat horizontal line, indicating that the value 
of the controlled property is the same at each point in time within the clip's duration. To change the value 
(and the rate of its change) at any point, you can add one or more keyframes to the clip and drag them to 
appropriate vertical positions representing their values.</p>
       <p>You can:</p>
diff --git a/help/C/layers.page b/help/C/layers.page
index dcbcb5f..8a8fb1c 100644
--- a/help/C/layers.page
+++ b/help/C/layers.page
@@ -29,12 +29,12 @@
      <p><em>Layers</em> are a fundamental concept for advanced editing in the timeline: compositing, mixing 
multiple videos simultaneously, and adding titles depend on this feature.</p>
      <p>It is easier to think of layers in terms of images painted on glass. With several pieces of glass 
stacked on top of each other, each of these pieces of glass is a layer. If the top piece of glass is 
completely painted over, none of the pieces of glass underneath will be visible. If, on the other hand, you 
only paint over a portion of a piece of glass, you will be able to see what is underneath the non-painted 
parts.</p>
 
-     <section>
+     <section id="opacity">
       <title>Opacity (how solid “opaque” things are)</title>
        <p>Each layer (and each clip) has its own transparency. To continue the paint on glass metaphor, if 
the paint is thin enough, it can be seen through. Visually, an opacity of 100% means you cannot see the clips 
below that layer or clip, and an opacity of of 50% means you can partly see them.</p>
      </section>
 
-     <section>
+     <section id="ui">
       <title>How this translates in terms of user interface</title>
        <p>While, in real life, you can stack pieces of glass onto each other in three dimensions, your 
computer monitor only has two dimensions. Thus, the <em>layers on top</em> (the “Z” axis in the physical 
world) are also visually <em>on top</em>, albeit on the “Y” axis.</p>
        <figure>
@@ -46,13 +46,13 @@
        </note>
      </section>
 
-     <section>
+     <section id="adding">
       <title>Adding and removing layers</title>
        <p>To create a layer, drag a clip to the middle space between two existing layers or just above the 
top layer or just below the bottom layer. Once the thin space between the layers is highlighted, release the 
clip.</p>
        <p>To remove a layer, click <guiseq><gui>Layer icon</gui><gui>Delete layer</gui></guiseq>. The 
<gui>Layer icon</gui> can be found at the right of the layer name field.</p>
      </section>
 
-     <section>
+     <section id="audio">
       <title>What about audio layers?</title>
        <p>Unlike in vision, multiple sounds do not “block” each other. If you have multiple audio clips on 
separate layers, their sound will be mixed together. Controlling the volume of those audio clips simply 
changes their relative loudness.</p>
      </section>
diff --git a/help/C/mainwindow.page b/help/C/mainwindow.page
index c9e10f3..dc4b28a 100644
--- a/help/C/mainwindow.page
+++ b/help/C/mainwindow.page
@@ -48,7 +48,7 @@
     <p>Hovering the mouse cursor over an element in the main window usually reveals an information tooltip 
regarding its function.</p>
     </note>
 
-    <section>
+    <section id="headerbar">
      <title>Header bar</title>
       <p>The header bar is a place where basic functions such as <gui>Undo</gui>, <gui>Redo</gui>, 
<gui>Save</gui>, or <gui>Render</gui> can be directly accessed. It also contains the main <gui>menu 
button</gui> where you can find further functions such as <gui>New project</gui>, <gui>Open project</gui>, 
<gui>Project settings</gui> or <gui>Preferences</gui>.</p>
       <note style="tip">
@@ -56,7 +56,7 @@
       </note>
     </section>
 
-    <section>
+    <section id="ruler">
      <title>Ruler</title>
       <p>The ruler plays a crucial role in your interaction with the timeline. First, it represents a time 
scale providing time measurements (in seconds) for overall orientation. Second, it constitutes the primary 
surface on which you can move the playhead (and thus, change your position in time). To move your position, 
click anywhere on the ruler. You can also <em>scrub</em> the timeline by clicking on the ruler and holding 
down the mouse button while moving. See the section on <link xref="movearoundtimeline">scrubbing</link> for 
more details.</p>
       <p>The current playhead position is indicated by a red vertical line:</p>
@@ -68,13 +68,13 @@
       </note>
     </section>
 
-    <section>
+    <section id="timeline">
      <title>Timeline</title>
       <p>The timeline is the core user interface component that you will use for editing. Vertically, it is 
divided into layers that can be filled with audio and video clips. Horizontally, it constitutes a 
time-proportional representation of your project's chronology. Various levels of zoom can be applied to the 
timeline. However, these apply only to the horizontal (chronological) dimension of the timeline.</p>
       <p>See the <link xref="layers">Understanding layers</link> and <link xref="movearoundtimeline">Moving 
around the timeline</link> pages for more information on how to work with the timeline.</p>
     </section>
 
-    <section>
+    <section id="timelinetoolbar">
      <title>Timeline toolbar</title>
       <p>The timeline toolbar is located at the right edge of the timeline. It contains basic actions for 
editing in timeline:</p>
       <list>
@@ -92,7 +92,7 @@
       </note>
     </section>
 
-    <section>
+    <section id="playbacktoolbar">
      <title>Playback toolbar</title>
       <p>This toolbar, located below the previewer, contains buttons controlling the playback of the 
timeline. Options provided by the toolbar are the following:</p>
       <list>
@@ -105,7 +105,7 @@
       <p>For more information on how to move on the timeline, see the <em>Moving the playhead</em> and 
<em>Scrubbing</em> sections on the <link xref="movearoundtimeline">Moving around the timeline</link> page.</p>
     </section>
 
-    <section>
+    <section id="viewer">
      <title>Previewer</title>
       <p>The previewer displays:</p>
       <list>
@@ -123,7 +123,7 @@
       </note>
     </section>
 
-    <section>
+    <section id="left">
      <title>Left pane</title>
       <p>The left pane contains media and effect libraries. You can switch between them by selecting the 
appropriate tab. The <gui>Media Library</gui> displays the imported media files in your project and allows 
you to manage them. The <gui>Effect library</gui> contains number of audio and video effects applicable to 
clips.</p>
       <note style="tip">
@@ -131,7 +131,7 @@
       </note>
     </section>
 
-    <section>
+    <section id="middle">
      <title>Middle pane</title>
       <p>The middle pane contains <gui>Clip configuration</gui>, <gui>Transitions</gui> and <gui>Title 
editor</gui>. You can switch between them by selecting the appropriate tab. The <gui>Clip configuration</gui> 
allows you to activate, deactivate or configure settings of effects applied to a selected clip. 
<gui>Transitions</gui> let you pick and configure the transition type when two clips overlap in the timeline. 
With <gui>Title editor</gui> you can create new clips with titles or add titles to existing ones.</p>
     </section>
diff --git a/help/C/medialibrary.page b/help/C/medialibrary.page
index 98bb178..bc24687 100644
--- a/help/C/medialibrary.page
+++ b/help/C/medialibrary.page
@@ -28,26 +28,26 @@
 
     <title>Using the Media Library</title>
 
-        <section>
+        <section id="importing">
         <title>Importing a file to the <gui>Media Library</gui></title>
          <p>There are two ways to import files into the <gui>Media Library</gui>. The first way is to click 
on the <gui>Import</gui> button in the upper left corner. This will open a file chooser in which you can 
preview selected files or select multiple files (by holding <key>Shift</key> or <key>Control</key> while 
selecting them). The second way is to drag and drop the files from a file browser to the <gui>Media 
Library</gui>. <em>Files</em> imported into the <gui>Media Library</gui> are called <em>clips</em>.</p>
          <note>
              <p>The clips in the <gui>Media Library</gui> are sorted alphabetically.</p>
          </note>
        </section>
-       <section>
+       <section id="previewing">
         <title>Previewing a clip from the <gui>Media Library</gui></title>
          <p>To preview a clip before placing it on the timeline, you can double-click on it in the 
<gui>Media Library</gui>. This will open the clip in a window that automatically closes whenever you click 
outside the window.</p>
        </section>
-       <section>
+       <section id="searching">
         <title>Filtering search</title>
          <p>A search bar is shown at the top of the <gui>Media Library</gui>. Typing into the search entry 
filters the contents of the <gui>Media Library</gui> to show only clips whose filenames match your search 
terms. To reset the search entry, click the "cleanup" icon in the search entry.</p>
        </section>
-       <section>
+       <section id="modes">
         <title>View modes</title>
          <p>The <gui>Media Library</gui> can display your clips in a list or in an icon view. The default 
mode is icon view because it display more clips without needing to scroll down. However, the list view mode 
shows more details about each clip. To activate/deactivate it, click on the <gui>Show clips as a detailed 
list</gui> button next to the search bar.</p>
        </section>
-       <section>
+       <section id="selectingunused">
         <title>Selecting unused clips</title>
         <p>You may sometimes find that you have imported more clips that you needed in your project. 
<app>Pitivi</app> allows you to select clips that are present in the media library but not in the timeline. 
There are various reasons to do this:</p>
         <list>
@@ -59,7 +59,7 @@
         <p>To identify which clips are not being used in your project, use the <gui>Select clips that have 
not been used in the project</gui> button at the left side of the search bar. Unused clips will then be 
selected in the media library.</p>
         <note><p>If there are no unused clips in your project, nothing will be selected in the media 
library.</p></note>
        </section>
-       <section>
+       <section id="otheractions">
         <title>Other actions</title>
          <p>There are three further actions you can perform with clips. Each is represented by a button in 
the upper right part of the <gui>Media Library</gui>:</p>
          <list type="numbered">
diff --git a/help/C/movearoundtimeline.page b/help/C/movearoundtimeline.page
index 930ea5a..6298d84 100644
--- a/help/C/movearoundtimeline.page
+++ b/help/C/movearoundtimeline.page
@@ -28,12 +28,12 @@
 
     <title>Moving around the timeline</title>
 
-     <section>
+     <section id="activating">
       <title>Activating the timeline toolbar</title>
        <p>The timeline toolbar contains many tools, which become active once a clip is selected in the 
timeline. To select a clip, simply click on the desired clip in the timeline. When selected, the clip will 
become darker and the timeline toolbar items will now be clickable.</p>
      </section>
 
-     <section>
+     <section id="scrolling">
       <title>Scrolling</title>
        <p>You can scroll by:</p>
        <list>
@@ -43,7 +43,7 @@
        </list>
      </section>
 
-     <section>
+     <section id="zooming">
       <title>Zooming</title>
        <p>Zooming directly affects your editing accuracy and your ability to move quickly along the 
timeline:</p>
        <list>
@@ -74,7 +74,7 @@
        </note>
      </section>
 
-     <section>
+     <section id="scrubbing">
       <title>Scrubbing</title>
        <p><em>Scrubbing</em> is a way of moving the playhead that allows you to:</p>
        <list>
diff --git a/help/C/presets.page b/help/C/presets.page
index 6ad1b86..8239b7c 100644
--- a/help/C/presets.page
+++ b/help/C/presets.page
@@ -27,7 +27,7 @@
     <title>Presets</title>
     <p>Both the <gui>Project settings</gui> dialog and the <gui>Rendering</gui> dialog allow you to save 
presets for later use. If you often deal with the same kind of project settings, with different cameras or 
target devices for rendering, you may want to create custom presets.</p>
     <note><p>In project settings, video presets and audio presets are independent of each other.</p></note>
-    <section>
+    <section id="adding">
         <title>Creating and editing presets</title>
         <p>To create a preset:</p>
         <steps>
@@ -43,7 +43,7 @@
         </steps>
         <p>To remove a preset, simply select it in the presets combobox and click <guiseq><gui>Menu 
button</gui><gui>Remove</gui></guiseq>.</p>
     </section>
-    <section>
+    <section id="limiting">
         <title>Limiting the resolution of a rendering preset</title>
         <p>If you want to make a preset with a fixed maximum resolution, you need to edit the preset file 
with a text editor. Presets files are typically stored in ~/.local/share/pitivi/ ; since many devices don't 
have a maximum resolution, the width/height are set to 0 (unlimited) by default. You can change these values 
to the maximum resolution of your target device.</p>
     </section>
diff --git a/help/C/rendering.page b/help/C/rendering.page
index 11d0953..98dade8 100644
--- a/help/C/rendering.page
+++ b/help/C/rendering.page
@@ -41,7 +41,7 @@
      <note style="tip">
       <p>If your computer is set to suspend or hibernate automatically, <app>Pitivi</app> will automatically 
inhibit the power saving features during the render process.</p>
      </note>
-     <section>
+     <section id="differences">
       <title>Project settings and the rendering dialog</title>
       <p>The <gui>Project Settings</gui> are a base on which the <gui>Rendering dialog</gui> settings are 
applied when performing a render. The <gui>Project Settings</gui> are kept separate because they also 
determine how you preview the project while editing it. The values specified in the <gui>Rendering 
dialog</gui> are temporary and used only at render time. Because they are so closely related, the 
<gui>Rendering dialog</gui> has a button which opens the <gui>Project Settings</gui>.</p>
      </section>
diff --git a/help/C/selectiongrouping.page b/help/C/selectiongrouping.page
index b3a1849..8bf871a 100644
--- a/help/C/selectiongrouping.page
+++ b/help/C/selectiongrouping.page
@@ -48,7 +48,7 @@
        </note>
      </section>
 
-     <section>
+     <section id="grouping">
          <title>Grouping and ungrouping clips</title>
         <p>The grouping and ungrouping functions are useful when you want to add or separate audio tracks 
from video clips, or when you want to create a block of clips that you can select, edit and move all at 
once.</p>
         <p>Grouping clips in timeline:</p>
diff --git a/help/C/transitions.page b/help/C/transitions.page
index 63e30c9..5c8395b 100644
--- a/help/C/transitions.page
+++ b/help/C/transitions.page
@@ -28,14 +28,14 @@
 
     <title>Transitions</title>
 
-    <section>
+    <section id="crossfading">
       <title>Crossfading clips</title>
         <p>To do a crossfade between two clips on the same layer, simply drag one of the clips onto the 
other so that it overlaps. The overlapping region will be used as a space for transition between the two 
clips. You can adjust the length of the transition either by moving the clips or by trimming them. If you 
want to apply other types of transitions than the default (crossfade), see the <em>Other types of 
transitions</em> section on this page.</p>
       <note>
         <p>Crossfades are achieved using <app>Pitivi</app>'s video mixing features, which use keyframes to 
control the opacity of clips. This means that if you set opacity keyframes for a clip, they will be taken 
into account for the crossfade.</p>
       </note>
     </section>
-    <section>
+    <section id="types">
       <title>Other types of transitions</title>
       <p>Assuming that you have two overlapping clips in your timeline, you can achieve other types of 
transitions by following these steps:</p>
       <steps>
diff --git a/help/C/trimming.page b/help/C/trimming.page
index be1c074..0ae8c11 100644
--- a/help/C/trimming.page
+++ b/help/C/trimming.page
@@ -67,7 +67,7 @@
        </note>
      </section>
 
-     <section>
+     <section id="rollediting">
       <title>Roll editing</title>
        <p>Roll editing is a variant of basic trimming which, in addition to trimming a clip, <em>trims</em> 
the adjacent clips in a complementary way to prevent creating gaps.</p>
        <figure>
diff --git a/help/C/usingclips.page b/help/C/usingclips.page
index 92a947b..ae0188a 100644
--- a/help/C/usingclips.page
+++ b/help/C/usingclips.page
@@ -28,7 +28,7 @@
 
     <title>Using clips</title>
 
-     <section>
+     <section id="clipsfiles">
       <title>Clips vs files</title>
         <p><em>Files</em> are data on your hard disk (videos, music, pictures, etc.) that can be accessed by 
<app>Pitivi</app> and incorporated in your video editing project.</p>
         <p><em>Clips</em> are a visual representation of your files on the timeline. They represent the 
period of time they consume on the timeline and can be edited independently: each time you drag a file from 
the <gui>Media Library</gui> to the timeline, a new clip is created. As such, a file can be reused as much as 
you want to create any amount of different clips.</p>
@@ -37,7 +37,7 @@
        </note>
      </section>
 
-     <section>     
+     <section id="inserting">
      <title>Inserting clips</title>
      <p>From the <gui>Media Library</gui>, you can insert one or more clips by selecting them (use the 
<key>Ctrl</key> or <key>Shift</key> keys to select multiple clips) and doing one of the following:</p>
      <list>
@@ -50,7 +50,7 @@
      </p>
      </section>
 
-     <section>
+     <section id="moving">
       <title>Moving clips along the timeline</title>
        <p>You can move a clip within a layer or move it to a different layer.</p>
        <p>Click and drag a single clip to move it, and release the mouse button to place it. Dragging 
horizontally keeps the clip on the same layer, but dragging it vertically moves the clip to a different layer 
(see <link xref="layers">Understanding layers</link> for more information).</p>
diff --git a/help/C/usingeffects.page b/help/C/usingeffects.page
index 1d6e5eb..56d6c21 100644
--- a/help/C/usingeffects.page
+++ b/help/C/usingeffects.page
@@ -22,12 +22,12 @@
 
     <title>Using effects</title>
 
-    <section>
+    <section id="library">
         <title>Effect Library</title>
         <p>The <gui>Effect Library</gui> contains all audio and video effects available on the system. The 
library shows either audio or video effects depending on which button (<gui>Show video effects</gui> or 
<gui>Show audio effects</gui>) in its upper left corner is activated. Once you choose audio or video effects 
you can further sort them by choosing one of the categories from the drop down list next to the two buttons. 
By default, the list is set to show all effects.</p>
         <p>Alternatively, you can use the <gui>Search Bar</gui> that is shown at the top of the <gui>Effect 
Library</gui>. Typing into the search entry filters the contents of the <gui>Effect Library</gui> to show 
only effects whose name or description match your search terms. To reset the search entry, click the 
<gui>Clear</gui> icon in the search entry.</p>
     </section>
-    <section>
+    <section id="configuring">
         <title>Configuring effects</title>
         <p>To configure an effect, simply select it in the <guiseq><gui>middle pane</gui><gui>Clip 
configuration</gui><gui>Effects</gui></guiseq>. The properties that can be adjusted will appear below in the 
same tab. Each variable can be put back to its original value by clicking the corresponding <gui>Reset to 
default value</gui> button.</p>
     </section>
diff --git a/help/C/workwithprojects.page b/help/C/workwithprojects.page
index 6cd1276..3474a3c 100644
--- a/help/C/workwithprojects.page
+++ b/help/C/workwithprojects.page
@@ -28,14 +28,14 @@
 
     <title>Working with projects</title>
 
-    <section>
+    <section id="saving">
     <title>Saving a project</title>
      <p>To save your project work, use the <gui>Save</gui> button in the header bar or press 
<keyseq><key>Ctrl</key><key>S</key></keyseq>. When you save a project for the first time, a dialog window 
appears, asking you where to save the project file and how to name it.</p>
       <note style="tip">
       <p>If you want to save your project to a different file, use <guiseq><gui>App menu</gui><gui>Save 
as</gui></guiseq> or press <keyseq><key>Ctrl</key><key>Shift</key><key>S</key></keyseq>. This can be used to 
create different versions of your project.</p>
       </note>
     </section>
-    <section>
+    <section id="undoing">
         <title>Undoing and reverting changes</title>
         <p>To undo a change, simply click on the <gui>Undo</gui> button in the header bar or press 
<keyseq><key>Ctrl</key><key>Z</key></keyseq>. In addition to undoing individual changes, you can also decide 
to revert all the changes you have made since the last time you saved your project. To do so, use 
<guiseq><gui>App menu</gui><gui>Revert to saved version</gui></guiseq>.</p>
         <note style="tip">
@@ -51,7 +51,7 @@
       </note>
     </section>
 
-    <section>
+    <section id="pardar">
         <title>Pixel aspect ratio vs display aspect ratio</title>
         <p>Digital images are composed of a grid of <link 
href="http://en.wikipedia.org/wiki/Pixel";>pixels</link>, which may or may not be square. In some cases, you 
may need to set the <link href="http://en.wikipedia.org/wiki/Pixel_aspect_ratio";>pixel aspect ratio</link> 
(PAR) for the image to display correctly. On the other hand, <link 
href="http://en.wikipedia.org/wiki/Display_aspect_ratio";>display aspect ratio</link> (DAR) is the 
mathematical ratio of width:height for the whole image.</p>
         <p>In <app>Pitivi</app>, pixel aspect ratio and display aspect ratio are related to each other 
through video resolution (width and height). Once your resolution is set, setting the DAR will influence the 
PAR and vice versa. You can use either DAR or PAR, whichever you are most comfortable with.</p>


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