Startup configuration
If you think that updating the game's interface is not rational in terms of time costs, you can disable full-screen mode in startupConfig.
You can also set the initial position of the overlay on the screen.
startupConfig can be modified either through the index.html file or directly in your JS files before PortalSDK.initialize call.
Important notice: because the overlay position saves the position for the user, you maybe will not see the result of changing of initial overlay position.
You need to reset localStorage for that. Please refer to how to enable dev tools in Telegram
Expected results

Disabled fullscreen

Enabled fullscreen