[gimp-help] Add Step option to Gradient

[Julien Hardlin <jhardlin src gnome org>]

commit c3e6737f4984f9f3ba412a0c61dbdbcec8251372
Author: Julien Hardelin <jhardlin orange fr>
Date:   Tue Feb 25 08:10:04 2020 +0100

    Add Step option to Gradient

 images/C/dialogs/brushes-buttons.png    | Bin 7668 -> 2217 bytes
 images/C/toolbox/gradient-step-orig.jpg | Bin 0 -> 13429 bytes
 images/C/toolbox/gradient-step.jpg      | Bin 0 -> 4136 bytes
 src/toolbox/paint/gradient.xml          |  42 +++++++++++++++++++++++++++++---
 4 files changed, 38 insertions(+), 4 deletions(-)
---
diff --git a/images/C/dialogs/brushes-buttons.png b/images/C/dialogs/brushes-buttons.png
index 8b22437a5..86b307f5d 100644
Binary files a/images/C/dialogs/brushes-buttons.png and b/images/C/dialogs/brushes-buttons.png differ
diff --git a/images/C/toolbox/gradient-step-orig.jpg b/images/C/toolbox/gradient-step-orig.jpg
new file mode 100644
index 000000000..92075ef64
Binary files /dev/null and b/images/C/toolbox/gradient-step-orig.jpg differ
diff --git a/images/C/toolbox/gradient-step.jpg b/images/C/toolbox/gradient-step.jpg
new file mode 100644
index 000000000..a55e9fb57
Binary files /dev/null and b/images/C/toolbox/gradient-step.jpg differ
diff --git a/src/toolbox/paint/gradient.xml b/src/toolbox/paint/gradient.xml
index a5f9c9d1c..60c583bc7 100644
--- a/src/toolbox/paint/gradient.xml
+++ b/src/toolbox/paint/gradient.xml
@@ -2,8 +2,7 @@
 <!DOCTYPE sect2 PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
                        "http://www.docbook.org/xml/4.3/docbookx.dtd";>
 <!-- section history:
-    2018-04-05 j.h: update
-    2018-05-02 j.h: change "blend" to "gradient"
+    
 -->
 <sect2 xmlns:xi="http://www.w3.org/2001/XInclude"; id="gimp-tool-gradient">
   <title>Gradient</title>
@@ -25,8 +24,7 @@
     gradient, drag the cursor in the direction you want the gradient to go and 
     you release the mouse button when you feel you have the right position 
     and size of your gradient. The softness of the gradient depends on how far 
-you 
-    drag the cursor. The shorter the drag distance, the sharper it will be.
+    you drag the cursor. The shorter the drag distance, the sharper it will be.
   </para>
   <para>
     In former GIMP versions, you had to use the gradient editor to modify the 
@@ -581,6 +579,42 @@ you
               fileref="images/toolbox/gradient-midpoint.png"/>
             </imageobject>
           </mediaobject>
+          <para>
+            For Stops and Midpoints, <guilabel>Position</guilabel> refers to 
+            the gradient line: 0 is start endpoint, 100 is end endpoint.
+          </para>
+          <para>
+            <guilabel>Blending</guilabel>: you can change the blending mode 
+            between two stops, using the drop-down list. 
+            <guilabel>Step</guilabel> option appeared with GIMP-2.10.8: it 
+            creates a hard-edge transition between the two adjacent color 
+            stops at the midpoint.
+            <figure>
+              <title><quote>Step</quote> option example</title>
+              <mediaobject>
+                <imageobject>
+                  <imagedata format="JPEG"
+                  fileref="images/toolbox/gradient-step-orig.jpg"/>
+                </imageobject>
+                <caption>
+                  <para>
+                    Original gradient
+                  </para>
+                </caption>
+              </mediaobject>
+              <mediaobject>
+                <imageobject>
+                  <imagedata format="JPEG"
+                  fileref="images/toolbox/gradient-step.jpg"/>
+                </imageobject>
+                <caption>
+                  <para>
+                    Step applied at Midpoint2
+                  </para>
+                </caption>
+              </mediaobject>
+            </figure>
+          </para>
           <para>
             <emphasis role="bold">Changing color</emphasis>: in stop and 
             end data windows, you have color dwells with a drop-down list. The