[gimp-help-2] Update mouse-wheel actions

[Julien Hardlin <jhardlin src gnome org>]

commit c3e586c4a1d59d84d640ae500c9622c6925c3a79
Author: Julien Hardelin <jhardlin orange fr>
Date:   Mon May 28 20:52:49 2018 +0200

    Update mouse-wheel actions

 .directory            |  6 +++++
 src/toolbox/intro.xml | 67 ++++++++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 70 insertions(+), 3 deletions(-)
---
diff --git a/.directory b/.directory
new file mode 100644
index 000000000..a300a1bad
--- /dev/null
+++ b/.directory
@@ -0,0 +1,6 @@
+[Dolphin]
+Timestamp=2018,5,27,7,18,5
+Version=3
+
+[Settings]
+HiddenFilesShown=true
diff --git a/src/toolbox/intro.xml b/src/toolbox/intro.xml
index 3512aa08b..f5560a9ae 100644
--- a/src/toolbox/intro.xml
+++ b/src/toolbox/intro.xml
@@ -2,10 +2,8 @@
 <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
                        "http://www.docbook.org/xml/4.3/docbookx.dtd";>
 <!-- section history:
+  2018-05-23 j.h: add mouse scroll-wheel actions
   2012-12-08 add sliders by j.h
-  2012-04-27 update to v2.8 by j.h
-  2007-12-01 up to v2.4 fr; en by PP
-  2005-11-26 fixed images and tips structure by romanofski
 -->
 <sect1 id="gimp-toolbox" xmlns:xi="http://www.w3.org/2001/XInclude";>
   <title>The Toolbox</title>
@@ -351,5 +349,68 @@
         </listitem>
       </varlistentry>
     </variablelist>
+
+    <variablelist>
+      <varlistentry>
+        <term>Mouse Scroll-Wheel actions</term>
+        <listitem>
+          <indexterm>
+            <primary>Mouse Scroll-Wheel</primary>
+          </indexterm>
+          <para>
+                                               When using tools, you can use the mouse scroll-wheel, in 
+                                               combination with various modifiers, to do useful things with 
the 
+                                               tool options of the selected tool:
+                                       </para>
+                                       <itemizedlist>
+                                               <listitem>
+                                                       <formalpara>
+                                                               <title>Alt + Mouse-wheel:</title>
+                                                               <para>
+                                                                       increase/decrease 
<emphasis>opacity</emphasis>
+                                                               </para>
+                                                       </formalpara>
+                                               </listitem>
+                                               <listitem>
+                                                       <formalpara>
+                                                               <title>Shift + Primary + Mouse-wheel:</title>
+                                                               <para>
+                                                                       increase/decrease <emphasis>aspect 
ratio</emphasis>
+                                                               </para>
+                                                       </formalpara>
+                                               </listitem>
+                                               <listitem>
+                                                       <formalpara>
+                                                               <title>Shift + Alt + Mouse-wheel:</title>
+                                                               <para>
+                                                                       increase/decrease 
<emphasis>angle</emphasis>
+                                                               </para>
+                                                       </formalpara>
+                                               </listitem>
+                                               <listitem>
+                                                       <formalpara>
+                                                               <title>Primary + Alt + Mouse-wheel:</title>
+                                                               <para>
+                                                                       increase/decrease 
<emphasis>size</emphasis>
+                                                               </para>
+                                                       </formalpara>
+                                               </listitem>
+                                               <listitem>
+                                                       <formalpara>
+                                                               <title>Shift + Primary + Alt + 
Mouse-wheel:</title>
+                                                               <para>
+                                                                       increase/decrease 
<emphasis>spacing</emphasis>
+                                                               </para>
+                                                       </formalpara>
+                                               </listitem>
+                                       </itemizedlist>
+                                       <para>
+                                               Note: the Primary modifier is usually Ctrl or Cmd, depending 
on 
+                                               your platform.
+                                       </para>
+                               </listitem>
+                       </varlistentry>
+               </variablelist>
+               
   </sect2>
 </sect1>