What do these buttons do? Hog500

there are a few buttons on my 500 that I don't understand.

First is the "Menus" button - I know what this does on a 1k but not the 500

"Cue" (top right of programmer, above 'list')

There is also a blank button in that group of buttons


and a blank button which is 4 buttons above 'go to'

and there is another blank button somewhere in the programmer
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