You don't need to create 'new pages' for additional banks. It is all done automatically as you add or delete banks from a folder.
A folder can contain up to 500 reg. banks, and the selection screen displays all the banks in a given folder arranged alphabetically, 10 on each page. If there are any folders at the same level, it will list those first (even if they don't contain registrations).
If there are more than 10 items to list in a given folder, the display will automatically create tabs for the additional pages to display them. You will see these at the bottom left of the screen and can move through them to the page that you want using the buttons underneath.
There can be a maximum of 50 'pages' for a given folder, which represents the 500 file limit divided by the number of items (10) that can be displayed per page.
Note that these 'pages' are not different physical locations, they are just a way of displaying different parts of the list of files in the folder. In the same way that the number of pages automatically increase as you add more files, they also decrease if you delete files.
Regards
Ian