INPUTMANAGER - More information on this key-in please?

I have happened across this key-in INPUTMANAGER and I need to know more about customising the popup menus with it because they are faaaaaaaar superior to the ribbon groups I have been suffering with.

It appears to be associated with the V8i mode - ToolBox

INPUTMANAGER MENU gives this popup

 

And

INPUTMANAGER MENU TASKS

Will pop up with the current Task List selected either in the associated toolbox

or the key-in

TASK MENU

There is literally two mentions of this Key-In in the CONNECT literature and it is completely absent from the Key-In Index 

https://docs.bentley.com/LiveContent/web/MicroStation%20Help-v22/en/GestureAssignmentsFlicks.html

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