controlling second window through ams?

[curious1]

wondering if you can send commands to a second window in AMS?. An example would be to have 2 Pages open simultaniously and using 2 screens. Page 2 would be Fullscreen with Image Background and Paragraph formatted in the center. From Page 1 I would like to change the background image and paragraph text.

this can ofc be done easily on Page1 but I would like page 1 to be the controller for the content on page 2.