How to resize the desktop background

1. First, right-click a blank space on the desktop and select Personalization Options.

2. Then, in the Personalize window, select the Background option.

3. Secondly, in the background tab, select the picture to resize, click the browse button, and select the picture to set as the desktop background.

4. Finally, after selecting a picture, you will see the option of "Picture Location". You can choose options such as Fill, Fit, Stretch and Tile to automatically resize the picture to fit the screen resolution.