Hi pn9821,
Thank you for reaching Microsoft community. We appreciate for sharing your concern to us.
I am aware of your desire to connect your 27-inch monitor to your Surface Pro 9, making sure to utilize the entire screen rather than having empty spots on either side. I am here to help and let us work on this together. Allow me to ask some questions.
- May I know which Surface pro 9 configuration do you have, the Intel or 5G(SQ3)?
- What is the make and model of the monitor you've used?
To ensure that you use all the screen space on your 27-inch monitor when connected to your Surface Pro 9, you need to adjust the display settings on your Surface device. Here are the steps to follow:
- Connect your Surface Pro 9 to your 27-inch monitor using an appropriate cable.
- Once connected, go to the Start menu and click on the Settings icon.
- In the Settings menu, click on System, and then click on Display.
- Under the Display settings, you will see a drop-down menu labeled "Multiple displays." Click on it and select "Extend desktop."
- Once you have selected "Extend desktop," you will see two screens displayed on the Display settings page. Click on the screen that represents your 27 inch monitor.
- Scroll down to the "Resolution" section and select the highest resolution available for your monitor. This will ensure that you use all the screen space on your monitor.
- Click on the "Apply" button to save the changes.
I hope this helps. Let me know how it goes.
Kind regards,
Lavenia