How Win10 changes the background image of the mail application

Whether it is Microsoft or Apple or Google, the mail application will be provided in the system. The mail application on the Win10 system has been refreshed by Microsoft's new design. Not only is the new design, the background image of the mail application can be changed, the following is the specific operation method.
Methods
1. After opening the mail application, click the gear icon in the lower left corner to open the settings.
2. In the settings list, select an option.

3. Click on the browse under the background image, select the image, and click OK.

Microsoft provides a custom background in multiple applications. After customizing the background of the email application, the email application has become more personalized.