I'm using version 9.2 of Keyboard Maestro on a 13" MacBook Pro (2018) running macOS Big Sur 11.3 with an external 24" monitor. I created a Palette macro following Kourosh Dini's book on Taking Smart Notes with DEVONthink v.1.3 and running version 3.7 of DEVONthink Pro. Following Dini's instructions, I created a Palette macro that, when I press the specified key combination, puts a palette on the screen showing all the KM macros in a long, single column list. I can select any item displayed to run the associated macro, or I can see the key combinations and use those.
However, the list of macros extends from the bottom of the menu bar on my 24" monitor and runs past the bottom of the screen--and I can't seem to scroll, move, or resize the displayed palette, so there are items below the bottom of the screen I can't see or access.