Beware that some keys set up by Karabiner-Elements could break KeyCue's display of Keyboard Maestro macros.
For instance, if I remap a key in Karabiner-Elements to F20 and use ⌘+F20 or ⌃+F20 as hotkey triggers in Keyboard Maestro, it will break KeyCue
That is – KeyCue will not show any of the Keyboard Maestro Macro hotkeys (that's why I post the tips on this forum).
If we use F20 alone, however, it does not break it. A few other keys set up by Karabiner will also break KeyCue.
I have reported this issue to KeyCue (Ergonis) support and hope they can find a solution.
The good news is that the mouse keys do not break KeyCue, and there are 32
mouse keys in Karabiner-Elements.
We can use USB device key trigger
for the mouse keys.