How do I change what page number to start with in Impress?

I’m using the page number to insert an incremental value for each slide (actually agenda item numbers). But the first slide should be numbered 0, since it’s a general slide and the second one is the first agenda item.

Can I set what page number to start with in Impress?

Impress follows the normal logic, that the title slide is the first slide you show. Therefore its page number is always 1.

All settings can be done View / Header & Footer and then you find 2 check boxes on the bottom left corner.