Hi al welborn,
Thanks for reaching out to Microsoft Q&A Forum. I understand that the display does not properly fit your monitor on Windows 11 even though it is set to full screen.
Since a Q&A Assist suggestion was already provided, please confirm that you have tried all Q&A Assist steps. In addition, please try to follow these steps:
1, Right-click the desktop > Display settings > Display resolution, then select the resolution marked as Recommended and click Apply.
2, In Display settings, scroll to Scale and layout > Scale, then set it to 100% or the recommended value for your monitor.
3, In Display settings, select Advanced display > Refresh rate, then choose the highest available refresh rate and apply changes.
4, Right-click the desktop > Display settings > Multiple displays, then confirm the correct monitor is selected if more than one display is shown.
5, Press Windows + X > Device Manager > Display adapters, right-click your graphics adapter, select Update driver, then choose Search automatically for drivers.
6, Open your monitor’s built-in on-screen menu using the physical buttons, then reset display or aspect ratio settings to default or Auto.
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