Define screen BUTTONS in Home to run program?

[lemontea]

Sorry if this is covered somewhere. I tried looking and searching the volume of information but could not find it.

Is it possible to define one of the screen softkeys to run a program?

(The user guide calls them BUTTONS.)

And to have that BUTTON definition automatically grab however many variables off the stack and then do its thing, and return the answer to the screen/stack?

So in other words, not bother executing programs by calling it with any other method, but just pressing the BUTTON.

Thanks.