[gimp-help] Add on-canvas layer selection

[Julien Hardlin <jhardlin src gnome org>]

commit 51139836996576512f81be9735e5b0e7c8b3dfc3
Author: Julien Hardelin <jhardlin orange fr>
Date:   Wed Dec 18 07:59:35 2019 +0100

    Add on-canvas layer selection

 images/C/toolbox/unified-transform-dialog.png | Bin 0 -> 35594 bytes
 src/concepts/layer-groups.xml                 |  23 +++++++++++++++++++++--
 2 files changed, 21 insertions(+), 2 deletions(-)
---
diff --git a/images/C/toolbox/unified-transform-dialog.png b/images/C/toolbox/unified-transform-dialog.png
new file mode 100644
index 000000000..20dac7590
Binary files /dev/null and b/images/C/toolbox/unified-transform-dialog.png differ
diff --git a/src/concepts/layer-groups.xml b/src/concepts/layer-groups.xml
index c902ee23e..7031a0feb 100644
--- a/src/concepts/layer-groups.xml
+++ b/src/concepts/layer-groups.xml
@@ -3,8 +3,7 @@
                        "http://www.docbook.org/xml/4.3/docbookx.dtd";>
 
 <!--Section History
-  2015-08-30 j.h Fix an error (layer group from visible is wrong)
-  2012-03-06 j.h: created
+  2019-12-18 j.h: add on-canvas layer selection
 -->
 
 <sect1 id="gimp-layer-groups">
@@ -16,6 +15,10 @@
        <indexterm>
     <primary>Pass Through</primary>
   </indexterm>
+  <indexterm>
+    <primary>Layer</primary>
+    <secondary>On-canvas layer selection</secondary>
+  </indexterm>
 
   <para>
     This possibility appeared with <acronym>GIMP-2.8</acronym>.
@@ -301,6 +304,22 @@
         </mediaobject>
       </listitem>
     </varlistentry>
+    
+    <varlistentry>
+      <term>Finding a layer</term>
+      <listitem>
+        <para>
+          When working with a lot of layers, finding a particular layer in the 
+          list may be difficult. With GIMP-2.10.10, a new 
+          <emphasis>on-canvas layer selection</emphasis> function appeared. 
+          <keycombo><keycap>Alt</keycap><keycap>Middle click</keycap>
+          </keycombo> on the image element you want to find the layer this 
+          element belongs to: the available layers will be looped through to 
+          show the new active layer and the layer name will be temporarily 
+          displayed in the status bar.
+        </para>
+      </listitem>
+    </varlistentry>
   </variablelist>
 
 </sect1>