PC Wallpapers

1. Select screen size.
2. Right click on the image.
3. Click the "Set as Wallpaper"

Mac Wallpapers

1. Select screen size.
2. Save the image.
3. Open the "Desktop Pictures" or "Appearance" control panel.
4. Click the "Select Picture" button.
5. Select the background picture you wish to add.
6. Click the "Open" button.
7. Choose the "tile on screen" option.
8. Click the "Set Desktop" button.