Ignoring page numbers in backup slides

Question

I am using the beamer document class in latex to make a presentation. I will have a number of back up slides which are there for offline viewing, reference etc. Beamer has a f

Answer 1

This can be done with the appendixnumberbeamer package. Just add \usepackage{appendixnumberbeamer} to the preamble and use \appendix before the first backup slide.