I have a WACOM tablet that I am trying to use in my college classes.  When I
use powerpoint, pre-prepared slideshows and try to write on the slides, which
works ok, as soon as I lift the pen, it advances to the next slide.  I don't
want it to.  I want to advance the slides when I want them to advance.  

I have the pen icon along with the previous, next and menu icons on each
slide but it still advances on its own.

What am I not getting?

Ed