First, please click the "Start Menu" on the desktop in Win 10 system, and select the "Settings" option in the start menu to enter the Win 10 system settings page. After entering the Win 10 system setting page, click the "Personalize" option in the page to enter the system personalization page, and we can set the desktop background picture. For the personalized menu setting of Win 10 system, you can right-click the desktop and select the Personalized menu, or you can enter the desktop background picture setting page. After entering the personalization page, the first thing you enter is the desktop background pattern setting. In the setting of background pattern, you need to choose how the desktop background changes, so click the position shown in the figure below and select the "Slide Show" option. After selecting the slide show mode, click the Browse button, select a folder with desktop background pictures, and then click Select Folder. Next, you need to choose how to display the desktop background picture. It is recommended not to change the default "fill" mode, because only in the fill mode can the desktop background picture be better switched.