userguide: add section with synonym "screen" for "RandR output"

While the docs describe the feature, plenty of people ask for it on IRC.
Let’s see if this makes it easier to find.

diff --git a/docs/userguide b/docs/userguide
index 99fb072c4b32a92ed1057a8536a6d1a96b3ba4eb..b684a6221008fb5a00f5385a0e8284dd927e169a 100644 (file)
--- a/docs/userguide
+++ b/docs/userguide
@@ -1524,6 +1524,11 @@ i3-msg 'rename workspace to "2: mail"
 bindsym $mod+r exec i3-input -F 'rename workspace to %s' -P 'New name: '
 --------------------------------------------------------------------------
 
+=== Moving workspaces to a different screen
+
+See <<move_to_outputs>> for how to move a container/workspace to a different
+RandR output.
+
 === Moving containers/workspaces to RandR outputs
 
 [[move_to_outputs]]