How To: Make A Window Full Screen (Hide The System UI -or- Stretch The Contents)
For setup designs using windows, the user may want the window to open full screen in order to be the focused objected.
Toby says 
the full screen result may require 3 adjustments:
- The System UI: Android usually reserces a slim portion at the top of the screen for the status bar. Some users may hide the status bar (
Launcher Options>UI & Animations>Hide status bar) and while the bar is hidden, its space remains. See below on how to Overlap system UI - Window Option Edit allows the setting of Full height
- Widow Resizing can be done manually by dragging the boundary or with the
icon to enter exact height and width as well as x/y coordinates.- Remember to check the contents of the window as well. If the window contains a shape or widget that does not extend to its boundaries or if the widget has margins which prevent it from resting on the window's edge, adjust these.
| Description | Image |
|---|---|
| I can't make the window any larger. |  |
| The reason is the System UI is reserving space at the top of the page. In order to hide this: • navigate to MainMenu > UI & Animation > Overlap system UI• check the box. |  |
| Full Height |  |
| Or try this: • Not only expanding the window container but also the window contents. |  |