Macro ID

Controls: Options Menu >> Macro Dialog >> ID

If you click on a macro entry in the list box, its single-character ID appears here. Or, you can enter an ID here and the list box highlight will move to the indicated macro. The keyboard focus then moves to the Run button, so that simply hitting Enter will cause that macro to run.

The selected ID that appears here is also the one that the Halt, Step, Cancel, and Edit buttons refer to.