How to change Windows 10 background image or picture?
Like any previous Microsoft Operating systems, you can customize the background image of your device. You can choose a picture from the Microsoft provided photo stocks, download a picture from online or use your own personal pictures as a background.
To change the background picture of your Windows 10 device (desktop, laptop, tablet, phone, etc)
1) Right click empty area on your Desktop and click Personalize
You can also search Personalize in Window search box, and click Themes and related settings
or click Start -> Settings -> Personalize
2) Click Background from the left panel
3) Under the background option, choose Picture. This is the default.
4) Under Choose your picture, click the picture to display as background or browse your computer and select personalized background picture.
5) In the Choose a fit, select how you want the picture show on the background. Fill is the default option.
The photo you chosen should display on your monitor as a background picture.