Windows Rules (Shuffler) doesn't seem to work

Sure,

  1. Create the directory ~/.config/budgie-extras/shuffler/windowrules

  2. Create a file containing these fields:

    XPosition=0
    YPosition=0
    Cols=2
    Rows=2
    XSpan=1
    YSpan=1
    Monitor=HDMI-1
    

    Save it, named after the WM class of the application’s windows, like: gedit.windowrule
    NB: the fields refer to grid positions & sizes, not px positions!

  3. Now let’s switch rules on:

    gsettings set org.ubuntubudgie.windowshuffler windowrules true
    

This example will make new gedit windows open in topleft quarter, on monitor HDMI-1. Any changes you make to the .windowrule file, or any new file, will be applied immediately.