Payslip Template Changes

Hi all, I'm hoping someone can help me here.

Our payslip is a customised version of the seeded one provided by Oracle that currently has every page in landscape.

We'd like to either amend the landscape cover page to portrait or add a portrait page to the document, but as soon as we do, the report itself errors when we run our test version.

Has anyone ever tried to change the style from landscape to portrait and if so, how was it done?

Many thanks!