The application switcher is currently only showing me the windows open in the current workspace. I would like to be able to see what windows I have open on all workspaces. I've been playing around with it for a while now. Is there something I'm missing? Or is it an impossibility?
Do you mean on the panel or on Alt - Tab? If on the panel you mean the 'Window Buttons' not the switcher (Switcher is the graphical display of all workspaces). Go to Settings - Panel, select the appropriate panel and go to Items, Windows buttons and click on the Edit button and look under Filtering.
If it is the Alt - Tab then what you are looking for is in Window Manager Tweaks - Cycling - and select 'Cycle through windows on all workspaces'
Thank you. I was originally talking about the Alt-Tab application switcher, but I hadn't payed attention to the fact that the windows from other workspaces weren't showing up on the panel until you pointed it out just now, so thanks for that too.