Make it more obvious how to place signature box on 2nd or later page of document

[DazeEnd]

Is your feature request related to a problem? Please describe.
When requesting a signature on a multi-page document, it is not obvious to the user how to place a signature box on the 2nd or later page.

In my own experience and in conversations with my users, it is very common that an inexperienced user clicks the name of the signer to place a signature box on the first page, then tries to drag the signature box into place on page 2. However, when dragging the signature box, they quickly learn that the placed signature box is confined to the first page and that it cannot be dragged to other pages.

The user may then try to scroll the document so that the desired page is visible in the preview before placing a signature box, but when they click the name of the signer the signature box is again placed on page 1.

It usually requires a phone call to me to explain how things work before they learn that they have to click on the desired page before placing the signature box.

This whole process is frustrating and confusing.

Describe the solution you'd like
Ideally, a signature box could be placed anywhere on the document, and then dragged to any other page. This would be the most obvious from the perspective of a new user.

Describe alternatives you've considered
If a signature box must be constrained to only one page, it should be much more obvious which page is currently selected so that the user can guess that they need to select the right page before placing the signature box. I would suggest that the currently selected page be highlighted with a colored frame.

Additional context