[gimp-help-2] Review channel descriptions (concepts, dialog, glossary)
- From: Ulf-D. Ehlert <ulfehlert src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gimp-help-2] Review channel descriptions (concepts, dialog, glossary)
- Date: Fri, 5 Nov 2010 19:27:15 +0000 (UTC)
commit 6102afddcdcb42f10895e6015382a6c5b9636558
Author: Ulf-D. Ehlert <ulfehlert svn gnome org>
Date: Fri Nov 5 18:50:12 2010 +0100
Review channel descriptions (concepts, dialog, glossary)
Especially, swap concepts with glossary; remove some confusing
(or wrong) parts; fix menuitems in dialog.
images/C/dialogs/channels-context-menu.png | Bin 9560 -> 4632 bytes
src/concepts/concepts.xml | 71 ++++++++++++++++----
src/concepts/qmask.xml | 2 +-
src/dialogs/channel-dialog.xml | 99 ++++++++++++++--------------
src/dialogs/channel-menu.xml | 97 ++++++++++++++++------------
src/dialogs/channel-selection-mask.xml | 32 +++++----
src/dialogs/layer-mask.xml | 2 +-
src/dialogs/qmask.xml | 2 +-
src/glossary/glossary.xml | 88 +++++++------------------
9 files changed, 207 insertions(+), 186 deletions(-)
---
diff --git a/images/C/dialogs/channels-context-menu.png b/images/C/dialogs/channels-context-menu.png
index 043b347..ce04274 100644
Binary files a/images/C/dialogs/channels-context-menu.png and b/images/C/dialogs/channels-context-menu.png differ
diff --git a/src/concepts/concepts.xml b/src/concepts/concepts.xml
index d604928..6ba9478 100644
--- a/src/concepts/concepts.xml
+++ b/src/concepts/concepts.xml
@@ -93,23 +93,64 @@
</para>
</listitem>
</varlistentry>
- <varlistentry>
- <term>Channels</term>
+ <varlistentry id="gimp-concepts-channels" xreflabel="Channels">
+ <term>
+ <phrase>Channels</phrase>
+ <indexterm>
+ <primary>Channel</primary>
+ </indexterm>
+ </term>
<listitem>
+ <!--TRANSLATORS: this is the modified text from glossary.xml, so
+ you should check po/LANG/glossary.po for an old translation-->
+ <para>
+ A Channel is a single component of a pixel's color. For a colored
+ pixel in <acronym>GIMP</acronym>, these components are usually Red,
+ Green, Blue and sometimes transparency (Alpha). For a
+ <link linkend="glossary-graylevel">Grayscale</link> image, they are
+ Gray and Alpha and for an
+ <link linkend="glossary-indexedcolors">Indexed</link> color image,
+ they are Indexed and Alpha.
+ </para>
+ <para>
+ The entire rectangular array of any one of the color components for
+ all of the pixels in an image is also referred to as a Channel. You
+ can see these color channels with the
+ <link linkend="gimp-channel-dialog">Channels dialog</link>.
+ </para>
+ <para>
+ When the image is displayed, <acronym>GIMP</acronym> puts these
+ components together to form the pixel colors for the screen,
+ printer, or other output device. Some output devices may use
+ different channels from Red, Green and Blue. If they do,
+ <acronym>GIMP</acronym>'s channels are converted into the
+ appropriate ones for the device when the image is displayed.
+ </para>
+ <para>
+ Channels can be useful when you are working on an image which needs
+ adjustment in one particular color. For example, if you want to
+ remove <quote>red eye</quote> from a photograph, you might work on
+ the Red channel.
+ </para>
+ <para>
+ You can look at channels as masks which allow or restrict the output
+ of the color that the channel represents. By using Filters on the
+ channel information, you can create many varied and subtle effects
+ on an image. A simple example of using a Filter on the color
+ channels is the
+ <link linkend="plug-in-colors-channel-mixer">Channel Mixer</link>
+ filter.
+ </para>
<para>
- In <acronym>GIMP</acronym>, Channels are the smallest units of
- subdivision in the stack of layers from which the image is
- constructed. Every Channel in a layer has exactly the same size as
- the layer to which it belongs, and, consequently consists of the
- same number of pixels. Every pixel can be regarded as a container
- which can be filled with a value ranging from 0 to 255.The exact
- meaning of this value depends on the type of channel, e.g. in the
- <acronym>RGB</acronym> color model the value in the
- <emphasis>R</emphasis>-channel means the amount of red which is
- added to the color of the different pixels, in the selection
- channel, the value denotes how strongly the pixels are
- selected, and in the alpha channel the values denote how
- transparent the corresponding pixels are.
+ In addition to these channels, <acronym>GIMP</acronym> also allows
+ you to create other channels (or more correctly, Channel Masks),
+ which are displayed in the lower part of the Channels dialog. You
+ can create a <link linkend="gimp-channel-new">New Channel</link> or
+ save a <link linkend="gimp-selection-to-channel">selection to a
+ channel (mask)</link>.
+ See the glossary entry on
+ <link linkend="glossary-masks">Masks</link> for more information
+ about Channel Masks.
</para>
</listitem>
</varlistentry>
diff --git a/src/concepts/qmask.xml b/src/concepts/qmask.xml
index 9d3c032..78e605b 100644
--- a/src/concepts/qmask.xml
+++ b/src/concepts/qmask.xml
@@ -106,7 +106,7 @@
</tip>
<para>
You can learn more on
- <link linkend="dialogs-selection-masks">Selection masks</link> in the
+ <link linkend="gimp-channel-mask">Selection masks</link> in the
section dedicated to the channel dialog.
</para>
</sect2>
diff --git a/src/dialogs/channel-dialog.xml b/src/dialogs/channel-dialog.xml
index 04bf3f4..c461aa4 100644
--- a/src/dialogs/channel-dialog.xml
+++ b/src/dialogs/channel-dialog.xml
@@ -30,32 +30,31 @@
The Channels dialog is the main interface to edit, modify and manage your
channels. Channels have a double usage. This is why the dialog is divided
into two parts: the first part for color channels and the second part for
- selection masks.
+ <link linkend="gimp-channel-mask">selection masks</link>.
</para>
<para>
- Color channels: Color channels apply to the image and not to a specific
- layer. Basically, three primary colors are necessary to render all the
- wide range of natural colors. As other digital software, the GIMP
- uses Red, Green, and Blue as primary colors. The first and primary
- channels display the <guilabel>Red</guilabel>, <guilabel>Green</guilabel>,
- and <guilabel>Blue</guilabel>
- values of each pixel in your image. In front of each channel is a
- thumbnail displaying a grayscale representation of each channel, where
- white is 100% and black is 0% of the primary color. Alternatively, if your
- image is not a colored but a Grayscale image, there is only one primary
- channel called <guilabel>Gray</guilabel>.
- For an Indexed image with a fixed number of known colors there is also
- only one primary channel called <guilabel>Indexed</guilabel>.
- Then there is a optional channel called <guilabel>Alpha</guilabel>.
- This channel displays transparency values of each pixel in your image
- (See <link linkend="glossary-alpha-channel">Alpha Channel</link> in
- Glossary). In front of this channel is a thumbnail displaying a grayscale
- representation of the transparency where white is opaque and visible, and
- black is transparent and invisible. If you create your image without
- transparency then the Alpha channel is not present, but you can add it
- from the <link linkend="gimp-layer-dialog">Layers dialog menu</link>.
- Also, if you have more than one layer in your image, GIMP automatically
- creates an Alpha channel.
+ <emphasis>Color channels</emphasis> apply to the image and not to a
+ specific layer. Basically, three primary colors are necessary to render
+ all the wide range of natural colors. As other digital software,
+ <acronym>GIMP</acronym> uses Red, Green, and Blue as primary colors. The
+ first and primary channels display the <guilabel>Red</guilabel>,
+ <guilabel>Green</guilabel>, and <guilabel>Blue</guilabel> values of each
+ pixel in your image. Next to the channel name is a thumbnail displaying a
+ grayscale representation of each channel, where white is 100% and black is
+ 0% of the primary color. Alternatively, if your image is not a colored but
+ a Grayscale image, there is only one primary channel called
+ <guilabel>Gray</guilabel>. For an Indexed image with a fixed number of
+ known colors there is also only one primary channel called
+ <guilabel>Indexed</guilabel>. Then there is a optional channel called
+ <guilabel>Alpha</guilabel>. This channel displays transparency values of
+ each pixel in your image (See <link linkend="glossary-alpha-channel">Alpha
+ Channel</link> in Glossary). In front of this channel is a thumbnail
+ displaying a grayscale representation of the transparency where white is
+ opaque and visible, and black is transparent and invisible. If you create
+ your image without transparency then the Alpha channel is not present, but
+ you can add it from the <link linkend="gimp-layer-dialog">Layers dialog
+ menu</link>. Also, if you have more than one layer in your image,
+ <acronym>GIMP</acronym> automatically creates an Alpha channel.
</para>
<note>
<para>GIMP doesn't support CMYK or YUV color models.</para>
@@ -121,9 +120,8 @@
<sect3 id="gimp-channel-dialog-calling">
<title>Activating the Dialog</title>
<para>
- The <quote>Channels</quote> dialog is a dockable dialog; see the
- section <xref linkend="gimp-concepts-docks"/> for help on manipulating
- it.
+ The <quote>Channels</quote> dialog is a dockable dialog; see
+ <xref linkend="gimp-concepts-docks"/> for help on manipulating it.
</para>
<para>
You can access it:
@@ -174,9 +172,10 @@
The top channels are the color channels and the optional Alpha
channel. They are always organized in the same order and they cannot
be erased. Selection masks are described below and displayed as a list
- in the dialog. Every channel appears in the list in form of a
- thumbnail. A right-click in a channel thumbnail opens the
- <link linkend="gimp-channel-menu">channel context menu</link>.
+ in the dialog. Every channel appears in the list with its attributes,
+ including a thumbnail and its name. A right-click in a channel list
+ entry opens the <link linkend="gimp-channel-menu">channel context
+ menu</link>.
</para>
</sect4>
@@ -241,7 +240,8 @@
</listitem>
</varlistentry>
<varlistentry>
- <term>Preview image</term>
+ <!--Preview image-->
+ <term>Thumbnail</term>
<listitem>
<para>
A small preview-icon represents the effect of the channel. On
@@ -281,23 +281,23 @@
<!--TODO: check: do we really need so many indexterms?-->
<indexterm>
<primary>Channel</primary>
- <secondary>Edit Channel attributes</secondary>
+ <secondary>Edit Channel Attributes</secondary>
</indexterm>
<indexterm>
<primary>Channel</primary>
- <secondary>Create a New Channel mask</secondary>
+ <secondary>Create a New Channel Mask</secondary>
</indexterm>
<indexterm>
<primary>Channel</primary>
- <secondary>Move Channel mask</secondary>
+ <secondary>Move Channel Mask</secondary>
</indexterm>
<indexterm>
<primary>Channel</primary>
- <secondary>Duplicate Channel mask</secondary>
+ <secondary>Duplicate Channel Mask</secondary>
</indexterm>
<indexterm>
<primary>Channel</primary>
- <secondary>Delete Channel mask</secondary>
+ <secondary>Delete Channel Mask</secondary>
</indexterm>
<indexterm>
<primary>Channel</primary>
@@ -319,11 +319,11 @@
</imageobject>
</inlinemediaobject>
</guiicon>
- <phrase>Edit channel attributes,</phrase>
+ <phrase>Edit Channel Attributes</phrase>
</term>
<listitem>
<para>
- only available for selection masks. Here you can change the
+ Only available for selection masks. Here you can change the
<guilabel>Channel name</guilabel>. The other two parameters
affect channel is visibility in the image window; they control
<guilabel>Opacity</guilabel> and color used for the mask in the
@@ -342,7 +342,7 @@
</imageobject>
</inlinemediaobject>
</guiicon>
- <phrase>New channel</phrase>
+ <phrase>New Channel</phrase>
</term>
<listitem>
<para>
@@ -354,7 +354,7 @@
used by pressing the <keycap>Shift</keycap> key when clicking).
This new channel is a channel mask (a selection mask) applied
over the image. See
- <link linkend="dialogs-selection-masks">Selection Mask</link>
+ <link linkend="gimp-channel-mask">Selection Mask</link>
</para>
</listitem>
</varlistentry>
@@ -369,11 +369,11 @@
</imageobject>
</inlinemediaobject>
</guiicon>
- <phrase>Raise channel,</phrase>
+ <phrase>Raise Channel</phrase>
</term>
<listitem>
<para>
- only available for selection masks : you can here put the
+ Only available for selection masks: you can here put the
channel up a level in the list. Press <keycap>Shift</keycap>
key to move channel to top of the list.
</para>
@@ -390,7 +390,7 @@
</imageobject>
</inlinemediaobject>
</guiicon>
- <phrase>Lower channel</phrase>
+ <phrase>Lower Channel</phrase>
</term>
<listitem>
<para>
@@ -411,7 +411,7 @@
</imageobject>
</inlinemediaobject>
</guiicon>
- <phrase>Duplicate channel</phrase>
+ <phrase>Duplicate Channel</phrase>
</term>
<listitem>
<para>
@@ -427,9 +427,8 @@
</tip>
</listitem>
</varlistentry>
- <varlistentry>
+ <varlistentry id="gimp-channel-selection-replace">
<term>
- <anchor id="gimp-channel-selection-replace"/>
<guiicon>
<inlinemediaobject>
<imageobject>
@@ -438,11 +437,11 @@
</imageobject>
</inlinemediaobject>
</guiicon>
- <phrase>Channel to selection</phrase>
+ <phrase>Channel to Selection</phrase>
</term>
<listitem>
<para>
- here you can transform the channel to become a selection. By
+ Here you can transform the channel to become a selection. By
default the selection derived from a channel replaces any
previous active selection. It's possible to change this by
clicking on control keys.
@@ -490,11 +489,11 @@
</imageobject>
</inlinemediaobject>
</guiicon>
- <phrase>Delete channel</phrase>
+ <phrase>Delete Channel</phrase>
</term>
<listitem>
<para>
- only available for selection masks: you can here delete the
+ Only available for selection masks: you can here delete the
active channel.
</para>
</listitem>
diff --git a/src/dialogs/channel-menu.xml b/src/dialogs/channel-menu.xml
index fc09dc4..781d7d5 100644
--- a/src/dialogs/channel-menu.xml
+++ b/src/dialogs/channel-menu.xml
@@ -1,16 +1,15 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sect4 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
"http://www.docbook.org/xml/4.3/docbookx.dtd";>
-<!-- section history:
- 2007-06-24 kost: added norwegian
- 2006-04-29 lexa: minor changes to docbook compliance
--->
+
<sect4 id="gimp-channel-menu">
<title>Channels Context Menu</title>
+
<indexterm>
<primary>Channels</primary>
<secondary>Menu</secondary>
</indexterm>
+
<figure>
<title>Channel Context Menu</title>
<mediaobject>
@@ -31,43 +30,59 @@
transformation to selection operations, each of them having its own
entry in the menu.
</para>
- <itemizedlist>
- <listitem>
- <para><guilabel>Edit channel attributes</guilabel>,
- <guilabel>New channel</guilabel>,
- <guilabel>Raise channel</guilabel>,
- <guilabel>Lower channel</guilabel>,
- <guilabel>Duplicate channel</guilabel>,
- <guilabel>Delete channel</guilabel>: see
- <link linkend="gimp-channel-edit">Managing channels</link>.
- </para>
- </listitem>
- <listitem>
- <para><guilabel>Channel to selection</guilabel>:
- Selection derived from channel replaces any previous active
- selection.
- </para>
- </listitem>
- <listitem>
- <para><guilabel>Add to selection</guilabel>:
- Selection derived from channel is added to previous active
- selection. Final selection is merging of both.
- </para>
- </listitem>
- <listitem>
- <para><guilabel>Substract from selection</guilabel>:
- Final selection is substraction of selection derived from a
- channel from previous active selection.
- </para>
- </listitem>
- <listitem>
- <para><guilabel>Intersect with selection</guilabel>:
- Final selection is intersection of selection derived from a
- channel with the previous active selection. Only common parts
- are kept.
- </para>
- </listitem>
- </itemizedlist>
+ <variablelist>
+ <varlistentry>
+ <term><guilabel>Edit Channel Attributes</guilabel></term>
+ <term><guilabel>New Channel</guilabel></term>
+ <term><guilabel>Raise Channel</guilabel></term>
+ <term><guilabel>Lower Channel</guilabel></term>
+ <term><guilabel>Duplicate Channel</guilabel></term>
+ <term><guilabel>Delete Channel</guilabel></term>
+ <listitem>
+ <para>
+ See
+ <link linkend="gimp-channel-edit">Managing channels</link>.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><guilabel>Channel to Selection</guilabel></term>
+ <listitem>
+ <para>
+ Selection derived from channel replaces any previous active
+ selection.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><guilabel>Add to Selection</guilabel></term>
+ <listitem>
+ <para>
+ Selection derived from channel is added to previous active
+ selection. Final selection is merging of both.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><guilabel>Substract from Selection</guilabel></term>
+ <listitem>
+ <para>
+ Final selection is substraction of selection derived from a
+ channel from previous active selection.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><guilabel>Intersect with Selection</guilabel></term>
+ <listitem>
+ <para>
+ Final selection is intersection of selection derived from a
+ channel with the previous active selection. Only common parts
+ are kept.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
</listitem>
</varlistentry>
</variablelist>
diff --git a/src/dialogs/channel-selection-mask.xml b/src/dialogs/channel-selection-mask.xml
index fe4ca18..06bd12b 100644
--- a/src/dialogs/channel-selection-mask.xml
+++ b/src/dialogs/channel-selection-mask.xml
@@ -6,8 +6,10 @@
2006-04-29 lexa: made docbook compliant
2006-02-25 romanofski fixed broken image references
-->
-<sect3 id="dialogs-selection-masks">
+<sect3 id="gimp-channel-mask">
<title>Selection masks</title>
+ <anchor id="dialogs-selection-masks" xreflabel="Selection masks"/>
+
<indexterm>
<primary>Masks</primary>
<secondary>Selection mask</secondary>
@@ -32,7 +34,6 @@
<figure>
<title>A selection composed out of channels.</title>
<mediaobject>
- <!--was dialogs-channel-masks.png-->
<imageobject>
<imagedata format="PNG"
fileref="images/dialogs/channel-masks-example.png"/>
@@ -40,15 +41,10 @@
</mediaobject>
</figure>
<para>
- Channels can be used to save and restore your selections. Clicking on the
- <guilabel>Quick mask</guilabel> button on the
- <link linkend="gimp-image-window">Image window</link>
- automatically creates a new channel called <guilabel>Qmask</guilabel>
- and saves the displayed active selection to a thumbnail in front of the
- channel.There are many selection tools in GIMP like rectangular
- selection tool or fuzzy selection for continuous selections. Selection
- Masks are a graphical way to build selections into a gray level channel
- where white pixels are selected and black pixels are not selected.
+ Channels can be used to save and restore your selections.
+ In the channel dialog you can see a thumbnail representing the selection.
+ Selection Masks are a graphical way to build selections into a gray level
+ channel where white pixels are selected and black pixels are not selected.
Therefore gray pixels are partially selected. You can think of them as
feathering the selection, a smooth transition between selected and not
selected. This is important to avoid the ugly pixelization effect when you
@@ -95,6 +91,7 @@
</listitem>
</varlistentry>
</variablelist>
+
<sect4>
<title>Using Selection Masks</title>
<para>
@@ -105,8 +102,17 @@
or black, the color Value (luminosity) will be used to define a gray
(medium, light, or dark). When your mask is painted, you can transform
it to a selection by clicking on the
- <guilabel>Channel to selection</guilabel>
- button or from the context menu.
+ <guiicon>
+ <inlinemediaobject>
+ <imageobject>
+ <imagedata format="PNG"
+ fileref="images/dialogs/stock-selection-16.png"/>
+ </imageobject>
+ </inlinemediaobject>
+ </guiicon>
+ button (<link linkend="gimp-channel-selection-replace">Channel to
+ Selection</link>) or from the
+ <link linkend="gimp-channel-menu">context menu</link>.
</para>
<para>
You can work in selection masks not only with the paint tool but also
diff --git a/src/dialogs/layer-mask.xml b/src/dialogs/layer-mask.xml
index 8082cfa..39ddc93 100644
--- a/src/dialogs/layer-mask.xml
+++ b/src/dialogs/layer-mask.xml
@@ -152,7 +152,7 @@
<caption>
<para>
The layer mask is active. You paint with black color, which
- makes the layer transparent : the underlying layer becomes
+ makes the layer transparent: the underlying layer becomes
visible.
</para>
</caption>
diff --git a/src/dialogs/qmask.xml b/src/dialogs/qmask.xml
index eabfa4f..d7f47f3 100644
--- a/src/dialogs/qmask.xml
+++ b/src/dialogs/qmask.xml
@@ -22,7 +22,7 @@
</figure>
<para>
A <guilabel>Quick Mask</guilabel> is a
- <link linkend="dialogs-selection-masks">Selection Mask</link>
+ <link linkend="gimp-channel-mask">Selection Mask</link>
intended to be used temporarily to paint a selection. Temporarily means
that, unlike a normal selection mask, it will be deleted from the
channel list after its transformation to selection. The
diff --git a/src/glossary/glossary.xml b/src/glossary/glossary.xml
index cde5842..51f70ec 100644
--- a/src/glossary/glossary.xml
+++ b/src/glossary/glossary.xml
@@ -233,61 +233,32 @@
<glossentry id="glossary-channels">
<glossterm>
- <phrase>Channels</phrase>
+ <phrase>Channel</phrase>
</glossterm>
- <indexterm significance="normal">
+ <indexterm>
<primary>Channel</primary>
- <secondary>Introduction</secondary>
</indexterm>
<glossdef>
- <para>
- A Channel is a single component of a pixel's color. For a colored
- pixel in <acronym>GIMP</acronym>, these components are usually Red,
- Green, Blue and sometimes transparency (Alpha). For a
- <link linkend="glossary-graylevel">Grayscale</link> image, they are
- Gray and Alpha and for an
- <link linkend="glossary-indexedcolors">Indexed</link> color image,
- they are Indexed and Alpha.
- </para>
- <para>
- The entire rectangular array of any one of the color components for
- all of the pixels in an image is also referred to as a Channel. You
- can see these color channels with the Channels dialog.
- </para>
- <para>
- When the image is displayed, <acronym>GIMP</acronym> puts these
- components together to form the pixel colors for the screen, printer,
- or other output device. Some output devices may use different
- channels from Red, Green and Blue. If they do,
- <acronym>GIMP</acronym>'s channels are converted into the
- appropriate ones for the device when the image is displayed.
- </para>
- <para>
- Channels can be useful when you are working on an image which needs
- adjustment in one particular color. For example, if you want to
- remove <quote>red eye</quote> from a photograph, you might work on
- the Red channel.
- </para>
- <para>
- You can look at channels as masks which allow or restrict the output
- of the color that the channel represents. By using Filters on the
- channel information, you can create many varied and subtle effects
- on an image. A simple example of using a Filter on the color
- channels is the
- <link linkend="plug-in-colors-channel-mixer">Channel Mixer</link>
- filter.
- </para>
- <para>
- In addition to these channels, <acronym>GIMP</acronym> also allows
- you to create other channels (or more correctly, Channel Masks),
- which are displayed in the lower part of the Channels dialog. You
- can convert a selection to a channel mask by using the
- <link linkend="gimp-selection-to-channel">Save to Channel</link>
- command. You can also create a channel by right-clicking in the
- Channels dialog and using the <link linkend="gimp-channel-new">New
- channel</link> command. See the glossary entry on
- <link linkend="glossary-masks">Masks</link> for more information about
- Channel Masks.
+ <!--TRANSLATORS: this is the modified text from concepts.xml, so
+ you should check po/LANG/concepts.po for an old translation-->
+ <para>
+ A channel refers to a certain component of an image. For instance, the
+ components of an <link linkend="glossary-rgb">RGB</link> image are the
+ three primary colors red, green, blue, and sometimes transparency
+ (alpha).
+ </para>
+ <para>
+ Every channel is a grayscale image of exactly the same size as the
+ image and, consequently, consists of the same number of pixels. Every
+ pixel of this grayscale image can be regarded as a container which can
+ be filled with a value ranging from 0 to 255. The exact meaning of
+ this value depends on the type of channel, e.g. in the
+ <acronym>RGB</acronym> color model the value in the
+ <emphasis>R</emphasis>-channel means the amount of red which is added
+ to the color of the different pixels; in the selection channel, the
+ value denotes how strongly the pixels are selected; and in the alpha
+ channel the values denote how opaque the corresponding pixels are.
+ See also <xref linkend="gimp-concepts-channels"/>.
</para>
</glossdef>
</glossentry>
@@ -1272,17 +1243,6 @@
surrounds a selection. The line is animated, so it looks as if
little ants are running around behind each other.
</para>
- <!-- off-topic in a glossary
- <para>
- You can disable the marching ants by unchecking the
- <menuchoice>
- <guimenu>View</guimenu>
- <guimenuitem>Show Selection</guimenuitem>
- </menuchoice>
- option or by using the keyboard shortcut
- <keycombo><keycap>Ctrl</keycap><keycap>T</keycap></keycombo>.
- </para>
- -->
</glossdef>
</glossentry>
@@ -1336,8 +1296,8 @@
<link linkend="gimp-channel-menu">Channel menu</link>. Channel
masks are so important in <acronym>GIMP</acronym> that a
special type has been implemented: the
- <link linkend="gimp-qmask">Quick mask</link>. See the
- <link linkend="dialogs-selection-masks">Selection mask</link>
+ <link linkend="gimp-qmask">Quick mask</link>. See the
+ <link linkend="gimp-channel-mask">Selection mask</link>
section for more details.
</para>
</listitem>
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