Description from extension meta
Remove Roll20 UIs for observer account
Image from store
Description from store
Remove UI elements from supported Virtual Tabletop systems. Present your battle maps without obstructive UI elements.
Simply click on the extension and enable Observer Mode, and all UI elements will disappear. Optionally, you can toggle additional features of the Observer Mode. When you need to access the removed elements, just click the extension again (note: this will reload the page).