Has anyone built a macro to switch to the previous desktop space?
So far my best alternative is to move the spaces next to each other and then do a 3-fingered swipe left and right on my laptop. But that's not as easy on my desk. And it's impossible to do while holding a window in motion to move it to the other desktop space.
I cannot find a KBM trigger for "Change Workspace/Desktop".
Current Key (free desktop management app) will call AppleScript when the desktop space is changed (Room Change Alerts – CurrentKey Stats) but it only tells the name of the new desktop space ("room" in CK) so that would have to be saved for every space change to know what the previous one is. (If you're with me so far, note that CK does not use the Mission Control Desktop numbers, it lets you assign text names to each desktop space and those are persistent if you rearrange the order of the desktops, hence a different term, "rooms".)
If there is no support in KBM for desktop space changes, I may try building it using AppleScript and CK, managed by KBM, but I'd rather have something closer to "off the shelf".