request_page_setup
Description:
Emitted once for every page that is printed.
This gives the application a chance to modify the page setup. Any changes done to setup will be in force only for printing this
page.
Parameters:
| context |
the `GtkPrintContext` for the current operation |
| page_nr |
the number of the currently printed page (0-based) |
| setup |
the `GtkPageSetup` |