To jump to the first frame on a new page and reset the page number:

nlSkipToPage 123

Typically, this would be used to reset numbering to 1 at the start of a new section. You can suppress the page throw with the optional left argument, for example:

0 nlSkipToPage 1
nlSwitch rpt_new

This allows you to restart page numbering and switch to a different page layout without generating a spurious blank page.

See also ...
nlSwitch – change layout in flight