[gimp-help] Updates in Layer concept and Brushes dialog

[Julien Hardlin <jhardlin src gnome org>]

commit 154ad280bd672e661eccc3851755115edf1fe14f
Author: Julien Hardelin <jhardlin orange fr>
Date:   Tue Apr 30 07:44:28 2019 +0200

    Updates in Layer concept and Brushes dialog

 images/C/dialogs/brushes-dialog.png | Bin 35836 -> 73795 bytes
 src/concepts/layers.xml             |  32 ++++++++++++++++++++------------
 src/dialogs/brushes-dialog.xml      |  21 +++++++++++++--------
 3 files changed, 33 insertions(+), 20 deletions(-)
---
diff --git a/images/C/dialogs/brushes-dialog.png b/images/C/dialogs/brushes-dialog.png
index 13df49c5a..004e51c23 100644
Binary files a/images/C/dialogs/brushes-dialog.png and b/images/C/dialogs/brushes-dialog.png differ
diff --git a/src/concepts/layers.xml b/src/concepts/layers.xml
index 8875b62e7..08b13dcb9 100644
--- a/src/concepts/layers.xml
+++ b/src/concepts/layers.xml
@@ -2,17 +2,8 @@
 <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
                        "http://www.docbook.org/xml/4.3/docbookx.dtd";>
 <!--Section History
-  2009-02-21 j.h: revised for v2.6
-  2008-04-05 Mr.Dust : reviewed and added 'ko'
-  2008-01-14 alex falappa: fixed outstanding TODOs for 'it'
-  2008-01-05 jpl: added lock-alpha image 'en;fr'
-  2007-08-18: alex falappa: translated example for Alpha Channel
-  2007-07-11: Added example for Alpha Channel by j.h
-  2007-06-14: alex falappa: updated italian Alpha channel section
-  2007-02-04: rebuilt Alpha channel section en;fr by j.h
-  2006-09-06: added norwegian translation by KoSt
-  2006-02-17: added italian translation by ciampix
-  2005-12-26: added german translation and made the file docbook compliant by lexa
+  2019-04-29 j.h: add Alt + click with mouse wheel
+  
 -->
 <sect1 id="gimp-concepts-layers">
   <title>Introduction to Layers</title>
@@ -79,7 +70,7 @@
     means the active drawable is something other than a layer.
   </para>
   <para>
-    In the menubar above an image window, you can find a menu called
+    In the menu bar above an image window, you can find a menu called
     <guimenu>Layer</guimenu>, containing a number of commands that
     affect the active layer of the image.  The same menu can be
     accessed by right-clicking in the Layers dialog.
@@ -318,6 +309,23 @@
           </tip>
         </listitem>
       </varlistentry>
+      
+      <varlistentry>
+        <term>Active layer</term>
+        <listitem>
+          <indexterm>
+            <primary>Layer</primary>
+            <secondary>Activate</secondary>
+          </indexterm>
+          <para>
+            Usually, you activate a layer, to work on it, clicking it in the 
+            layer list. When you have a lot of layers, finding which layer an 
+            element of the image belongs to is not easy: then, press 
+            <keycap>Alt</keycap> and click with Mouse wheel on this element to 
+            activate its layer.
+          </para>
+        </listitem>
+      </varlistentry>
 
       <varlistentry>
         <term>
diff --git a/src/dialogs/brushes-dialog.xml b/src/dialogs/brushes-dialog.xml
index 1101d4353..6d34171b8 100644
--- a/src/dialogs/brushes-dialog.xml
+++ b/src/dialogs/brushes-dialog.xml
@@ -2,14 +2,7 @@
 <!DOCTYPE sect2 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
                        "http://www.docbook.org/xml/4.3/docbookx.dtd";>
 <!-- section history:
-  2012-03-04 j.h: updated to v2.8
-  2012-03-02 j.h: added link to tagging
-  2008-12-13 j.h: updated to v2.6
-  2007-12-13 ude: changed en layout
-  2007-08-13 j.h added Copy Brush Location
-  2007-08-04 jh : updated to 2.4
-  2006-02-24 Written Brush Editor en;fr by j.h
-  2005-11-28 replaced informalfigures by figures by lexa
+  2019-04-29 j.h: add "Open brush as image" option
 -->
 <sect2 id="gimp-brush-dialog">
   <title>Brushes Dialog</title>
@@ -350,6 +343,18 @@
             </para>
           </listitem>
         </varlistentry>
+        <varlistentry>
+          <term>Open brush as image</term>
+          <listitem>
+            <anchor id="gimp-brush-as-image"/>
+            <para>
+              New option in GIMP-2.10.10: you can edit this image, copy it and 
+              Edit>Paste as>New brush. This is different from 
+              <xref linkend="gimp-brush-editor-dialog"/> that allows to 
+              modify an existing brush.
+            </para>
+          </listitem>
+        </varlistentry>
       </variablelist>
       <para>
         The functions performed by these buttons can also be accessed from the