How to set custom fields to be printed on last page of forms in Sage 50 US 2022?

hello all, 

I am trying to customize SO, Quotes & Invoices.  I want to put signature line and some notes at the last page.

In Sage50 2022 US Edition, can't find any option to set fields on last page.

Appreciate the help from community. 

Thanks in advance. 

NK.