I'd like to add a shortcut / icon to the tool bar for a Horizontal Dual Display. Is it possible to do so? Thanks.
I use this code to switch between single and dual lister, including a single or dual folder tree.
[code]@ifset:DUAL=On
Set DUAL=toggle,Horiz,remember,dest
Set TREE=Single,On
Set AUTOSIZECOLUMNS
@ifset:else
Set DUAL=toggle,Horiz,remember,dest
Set TREE=Dual,On
Set AUTOSIZECOLUMNS[/code]
These are on the default toolbars:
Set DUAL=Toggle,Horiz,ToggleLayoutSet DUAL=Toggle,Vert,ToggleLayoutLeo - I could not find the Horizontal Toggle on the default toolbar, only the vertical. But using your simple script I was able to create the button - thank you.
Amorax - thanks for the script with dual trees - much appreciated.
Never used the scripting function before - easy enough to do though 
You might be using old defaults from a previous version of Opus. If you right-click an empty part of any default toolbar, there are options to reset them to the current factory defaults. (You might want to do a config backup first, via Settings > Backup & Restore, just in case you had something on the old toolbar(s) which you wanted to keep.)