When presenting slides in a meeting for discussion, it's often useful to ensure that the slides have page numbers on them (it's also useful to have a count of the total number of slides)

This is useful for people watching the presentation (they know about how much more is left, they can say "go back to slide 3").

and it's useful for people transcribing the meeting or "scribing" in a text chat discussion (for example "now on slide 3")

It'd be great to add an option to inject page numbers (and optionally, the overall page count) in the generated slides.