Using Windows+Shift+Arrow keys to move the application window in Windowed Fullscreen from a low resolution monitor to a high resolution monitor does not resize the application window on a Windows 10 machine.
The issue does not appear on Windows 11, and seems to be related to the WM_SIZE message not being received in the case of moving from a low resolution monitor to a high resolution monitor.
1. Use a machine with Windows 10, a 2K monitor with 100% scaling, and a 4K monitor with 150% scaling.
2. Download the attached test project and open.
3. Open TestMap and play a Standalone Game.
4. Ensure that the fullscreen mode is Windowed Fullscreen with the console command “r.setres 2560x1440wf”.
5. Use Windows+Shift+Arrow keys to move the application window from the 2K monitor to the 4K monitor.
6. Observe that the application window does not resize after being moved to the 4k monitor.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-274239 in the post.
| 0 |
| Component | UE - Graphics Features |
|---|---|
| Affects Versions | 5.5.4 |
| Created | Apr 24, 2025 |
|---|---|
| Updated | Apr 24, 2025 |