I know if I leave the PowerApps Studio open for to long or open it in another browser window for an App it will switch from "Editing" to a read only mode in the PowerApps Studio.
Is there any way to manually switch to the Read Only mode, if I just want to look at how the App is setup and want to make sure I'm not editing or changing anything?
Open the app twice seems to work for me. In one browser tab have it open in edit mode, then duplicate the tab and open again in - close the first tab.