Command to move note octave using CTRL+ALT+arrow doesn't function

All of a sudden, moving a note (or notes) up or down an octave using CTRL+ALT+Arrow no longer works… when I go into Preferences, the field showing the particular macro is blank. When I try to input the default key commands using “Add Key Command” it won’t let me, the button is greyed out. When I reset to the factory defaults, it’s still blank. Confused LOL

On my laptop, Ctrl-Alt-down arrow flips my screen upside down (fortunately up arrow flips it back)! But it works fine on my desktop.

Take a look at this knowledge base article:

Same here.

It looks like Daniel has provided an answer below

Thank you, Daniel. Cheers :wink: