Sierra Video G.R.I.P. V3.1.0 - Manual (Page 25)

GRIP 3.1.0
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To program a button, click on a List box, which displays a dropdown list as shown:
There are several lists that group function types.
Select a function by moving the list to the desired function and clicking on the function.
G.R.I.P. puts this selection in the Drag Drop mode so you can now drag the function to
the button that is desired on the Special Push, First Push, and Shift Push rows.
A detailed list of functions can be found in the SCP panel manuals.