To enable or disable image background types for Edge new tab page, follow these steps- Search for regedit in the Taskbar search box. Click on the Registry Editor result.

System default theme, Light theme, or; Dark theme.; This will change the overall appearance of your browser which includes the background, new tabs, pages, dialogs, and other menus.

Microsoft is testing the ability to add set a custom background image for the new tab page in Microsoft Edge Canary build 82.0.457.0. For those who are using the latest Microsoft Edge Canary build ...