Main Page: Page Toolbar
The "Player Ribbon" is currently On the "Landing Page"-map, meaning all
players are viewing it currently.
The red
Player Ribbon/
Player Bookmark determine which page the
players are looking at. You can click and drag the "Player Ribbon" to move it between pages, thus moving the players to that new page. This does not affect the GM, and you need to double-click on the page to move yourself there.
It's smart for the GM to first move themselves to look at a page and make any last minute adjustments, before moving the players to the page.
See Split the Party if you want to have players looking at different maps/pages.
