Hi, Liqin1976!
Thanks for reaching Microsoft Community and posting your inquiry here. You may go change the location of your Taskbar on your Surface Pro 7 by doing the following steps:
- Press Windowsand type in Settings
- Once in **Settings,**click on Personalization.
- Please choose Taskbaron the left part of the menu.
- You will see options there on what you want for the Taskbar. Look for the one that says Taskbar location on screen.
- Under that, please select Bottom.
The changes will be applied right away. We hope this helps you out, we highly encourage you to inform our Community by clicking on Yes or marking my post as an answer. This will help other members who may have the same issue as you. Otherwise, don't hesitate to update us so we can further assist you.
Kind regards,
Janette_Z