Hi S Nader Rasuli,
Thank you for reaching Microsoft Community. I understand that you're experiencing issues with the font size on your Surface Laptop 5. I'll do my best to help you resolve this issue.
May I know which Microsoft 365 application do you use where the CTRL shortcuts stops working when you change the scaling settings? Does it happen only on Word, or it happens on all applications including Excel, PowerPoint and etc.?
Which Office license and version do you use? See this page for reference: About Office: What version of Office am I using? - Microsoft Support
Regarding the first issue, it's possible that the scaling settings you've adjusted are not being applied to all areas of the operating system. To resolve this, you can try adjusting the scaling settings in the Display settings. Here are the steps:
- Right-click on the desktop and select Display settings.
- Scroll down to the Scale and layout section and click on the drop-down menu under "Change the size of text, apps, and other items".
- Select the scaling percentage that you prefer.
- Click on the "Advanced scaling settings" link.
- Under "Custom scaling", adjust the percentage to your desired size.
- Click on "Apply" and then "Sign out now" to apply the changes.
If the issue persists, you can try resetting the scaling settings to default and then reapplying your preferred settings. Here are the steps:
- Go to Display settings as described above.
- Scroll down to the Scale and layout section and click on the drop-down menu under "Change the size of text, apps, and other items".
- Select "100%".
- Click on "Sign out now" to apply the changes.
- Once you've signed back in, go back to Display settings and adjust the scaling settings to your preferred size.
Regarding the second issue, it's possible that the Microsoft 365 application is not compatible with the scaling settings you've applied. To resolve this, you can try adjusting the compatibility settings for the Microsoft 365 application. Here are the steps:
- Right-click on the Microsoft 365 application icon and select Properties.
- Click on the Compatibility tab.
- Check the box next to "Override high DPI scaling behavior".
- Select "System (Enhanced)" from the drop-down menu.
- Click on "Apply" and then "OK" to save the changes.
If the issue persists, you can try repairing the Microsoft 365 installation. Here are the steps: Repair an Office application - Microsoft Support
- Go to Control Panel and select Programs and Features.
- Find the Microsoft 365 application in the list and right-click on it.
- Select "Change" and then "Repair".
- Follow the prompts to complete the repair process.
Additionally, if still the issues persist, kindly try running the Surface Diagnostic Toolkit on the device to run some system checks and repairs then make sure that all updates are installed in Windows Settings > Windows Updates including Optional updates. Fix common Surface problems using the Surface app and Surface Diagnostic Toolkit - Microsoft Support
Let me know how it goes.
Kind regards,
Marrion