To set each image as your desktop background, first click on it and then save the image.

For PC Users (Windows 10):

1. Click on the Windows icon in the lower left of your screen right next to the search bar.
2. Click on Settings in the list on the left.
3. Click on Personalization, fourth on the list.
4. Click on Background. ...
5. Click on the box underneath Background to choose between a picture, solid color, or slideshow for your background.

For Mac users:

1. Choose Apple () menu > System Preferences.
2. Click Desktop & Screen Saver.
3. From the Desktop pane, select a folder of images on the left, then click an image on the right to change your desktop picture.