Edits to FvwmBacker.

Wiki/Modules/FvwmBacker/index.md

@@ -9,56 +9,62 @@ description: |
 ---
 # FvwmBacker
 
-* TOC
-{:toc}
-
 The FvwmBacker module provides functionality to change the background when
 changing  desktops. Any command can be executed to change the backgrounds.
 Actually, any arbitrary command can be sent to fvwm to execute, so you
 could also do things such as changing window border colors, etc.
 
 Between the desktops you can personalize them by giving them individual
-background colors.
+background colors. This can be done by either using X11 color names or fvwm
+[Colorsets]({{ "/Config/Colorsets" | prepend: site.wikiurl }}),
+as illustrated below.
 
 {% fvwm2rc %}
 *FvwmBacker: Command (Desk 0) -solid white
-*FvwmBacker: Command (Desk 2) Colorset 5
+*FvwmBacker: Command (Desk 1) Colorset 5
 {% endfvwm2rc %}
 
-Instead of colors, you can define background images. This example, `fvwm-root`
-only supports .xpm, .png, and .svg. A tool like `feh` would support more image
-formats and allow you to set wallpapers per monitor (which fvwm-root cannot do).
+Instead of colors, use external applications to set background images.
+This example uses `fvwm-root`, which only supports `.xpm`, `.png`, and `.svg`
+and cannot scale images. A tool like `feh` would support more image formats,
+allow image scaling, and allow setting wallpapers per monitor.
 
 {% fvwm2rc %}
 *FvwmBacker: Command (Desk 0) Exec exec fvwm-root $[HOME]/background-mono.png
-*FvwmBacker: Command (Desk 2) Exec exec fvwm-root $[HOME]/wallpaper-nature.png
+*FvwmBacker: Command (Desk 1) Exec exec fvwm-root $[HOME]/wallpaper-nature.png
 {% endfvwm2rc %}
 
-Also to change the background for each page:
+The background can also be set for each page within each desktop:
 
 {% fvwm2rc %}
 *FvwmBacker: Command (Desk 1, Page 0 0) -solid green
 *FvwmBacker: Command (Desk 1, Page 1 0) Colorset 10
 {% endfvwm2rc %}
 
-The changes will not be implemented until you instruct Fvwm to update the screens
-during the initialization:
+`FvwmBacker` must be running in order to change the background. It is best to
+start `FvwmBacker` from the [StartFunction](
+{{ "/Config/Functions/StartFunction" | prepend: site.wikiurl }}):
 
 {% fvwm2rc %}
 AddToFunc StartFunction I Module FvwmBacker
 {% endfvwm2rc %}
 
 ## Example
 
-You can set each desktop screen (or page) with a different background. This
-advanced example changes your Desktop with 4 desks and FvwmPager miniature
-views with different images. 1st desk with grey color.
+This example shows how to use `FvwmBacker` with [FvwmPager](
+{{ "/Modules/FvwmPager" | prepend: site.wikiurl }}) to show the
+background image used on each desktop. In this example four
+desktops are used, each divided into two pages. Here is a screenshot
+of `FvwmPager` showing the four desktops and background image for each
+desktop. The first desktop is shown with a grey background.
 
-![image](multidesk-fvwmbacker.png){:.d-block .mx-auto .img-fluid}
+![Screenshot of FvwmPager showing four desktops with different backgrounds.](
+multidesk-fvwmbacker.png){:.d-block .mx-auto .img-fluid}
 
-For FvwmPager configuration, refer to the
-[FvwmPager]({{ "/Modules/FvwmPager" | prepend: site.wikiurl }}) page. Images
-for the miniature views you configure `Colorsets` with the option `Pixmap`.
+First configure the `Colorsets` used by `FvwmPager`. The first sets the
+grey background, the next three set the `Pixmap` that `FvwmPager` will
+use for the background of each desktop. The final colorset sets the color
+of the active page.
 
 {% fvwm2rc %}
 Colorset 22 #92a8d5
@@ -68,9 +74,11 @@ Colorset 25 Pixmap $[FVWM_USERDIR]/images/misc-thumb.png
 Colorset 30 fg #ffffff, bg #028383
 {% endfvwm2rc %}
 
-**FvwmPager**
+Next configure the desktops and `FvwmPager` to use the previous
+colorsets.
+
 {% fvwm2rc %}
-DesktopSize "2 1"
+DesktopSize 2x1
 
 DesktopName 0 Web
 DesktopName 1 Email
@@ -88,7 +96,9 @@ DestroyModuleConfig FvwmPager: *
 AddToFunc StartFunction I Module FvwmPager 0 3
 {% endfvwm2rc %}
 
-**FvwmBacker**
+Finally, configure FvwmBacker to set background images for
+each desktop. In addition the first desktop (`Desk 0`) will
+use a different image on each page.
 
 {% fvwm2rc %}
 DestroyModuleConfig FvwmBacker: *