It's on your desktop.
Wallpaper or a desktop background
Wallpaper , Desktop Background
This is simple. Open the location that contains your picture. Choose the picture you want and right-click it. The dropdown box that appears will have a selection to "set as desktop background". Click this selection and the dropdown will disappear. The picture should be on your desktop.
if you mean background picture for your desktop, right click on you desktop, go to properties then go to Desktop in properties then browe for a picture and click apply
Google Genius
Right click on the picture and select set as wallpaper. Alternatively, you can save the picture and then go into your display properties (right click on the desktop) and select it as the picture.
if you mean a screen shot its command, shift, and 3 (got to desktop, then you will see the pictures labled, picture 1, 2, 3, 4 and so on) if you want one certain thing its command, shift then 4. (capture the thing you want inside the box)
You can. As long as the computer can read the picture file with paint, it will work. Just right click on a blank spot on the desktop, then "Properties". Click on the "Desktop" Tab, then click "Browse". Find your picture, and click ok, then apply/ok. Also, you could go to the picture, right-clik it, then select set as desktop background. i want a picture on set as desktop background
set as a desktop
yes because it is the heck
Ok so what you want to do, is to first of all open up Photo Booth. Then drag the picture you want as your screen saver to the desktop. Then open up system preferences, then click Accounts, then it shows a picture of a icon or a previously selected pic. You then just simply change it. ( If you know how from there)
Did you try right clicking on your desktop and choosing "arrange icons with" and then choosing "show desktop icons"