On-Screen Display coordinate space : desktop
By default On-Screen Display coordinate space matches with coordinate space of rendering viewport, i.e. the last rectangular area application was rendering to. However, certain applications (e.g. Codename Panzers: Phase II) can use multiple viewports during frame rendering (e.g. different viewports for 3D world and HUD and so on). In this case the On-Screen Display origin follows one of corners of the last viewport, defined during frame rendering, which may be located in undesired position. On-Screen Display coordinate space override related options can be used for restoring expected origin position in such applications.
This button selects desktop as coordinate space for On-Screen Display. 

Hints:
- Anticheat systems of some multiplayer games may treat On-Screen Display usage as possible cheat and kick you from the server. Try to disable On-Screen Display support for such games to troubleshoot such issues.
- Currently %PRODUCTNAME% doesn't provide On-Screen Display support for native 64-bit applications and for DirectX10 applications when multisampled antialiasing is enabled.
- You may disable user interface tooltips via advanced %PRODUCTNAME% settings.