To download character icons onto your computer, just follow these steps:
Windows: Right click on the image and select “save image as”. Use your icon wherever you like!
Mac: Click and hold the mouse to “save image as”. Use your icon wherever you like!

To download a wallpaper onto your computer, just follow these steps:
Windows: Choose an image size. Right click on the image and select “set as desktop background”
Mac: Choose an image size. Click and hold the mouse to “save image as”. Add the image in Desktop Pictures.