In Recording Option dialog, you may deselect Record
keystrokes. But that will stop recording all the keystrokes and not
just Tab key. Only Mouse clicks will be recorded after that.
The tab key changes focus. Therefore Captivate assumes a
state change and takes a snapshot. The best way around this is to
switch from automatic recording to manual. But then, why is it a
big deal to simply delete that unwanted screenshot?
I can see that the norm for most is to take a new screen grab
when hitting Tab; however, on a project that we are workign on, we
are narrating information about a set of fields in an application,
and prefer to ffill them all in on one slide.