How can I change Desktop wallpaper?
Windows
You may use right-click an area on your desktop and choose "Properties". Select "Desktop" and you'll find a list of images to use for wallpaper. Click the background you want from the list and it will appear in the preview screen. You can choose to Center, Tile, or Stretch the image to fit the screen.
Apple Mac OS X
Choose Apple menu > System Preferences and click Desktop & Screen Saver.
What is my monitor screen resolution?
You are using