Looking at my Gamepad Configuration.. (see below) there are a few things that need to be explained.
Slew RA/Azm: - Straight forward.
Slew Dec/Alt: - Straight forward.
RA/Azm Activate: I think that think might default to "Hold to enable slewing" and I have reversed it to "Hold to disable slewing".
Dec/Alt Activate: I think that think might default to "Hold to enable slewing" and I have reversed it to "Hold to disable slewing".
These 2 settings to provide pure RA or Dec slewing on an EQ mount. This is not so important on an Alt/Azm mount. I have allowed simultaneous Alt and Azm input.
High Speed Activate: I have chosen the "B" button and "Hold = Fast, Release = Slow". I think that it may default to "Hold = Slow, Release = Fast".
EDIT: Actually, I think that it may default to "Hold = Fast, Release = Slow" and that the slow speed may be not so obvious when testing.
I prefer "Hold = Fast, Release = Slow" so that I don't accidently get fast slewing during final centering of a target.
BTW. In the Preview window, the difference between RumblePad mode and Normal mode can be demonstrated.