How to change the size of a desktop wallpaper?

I found some really cool backgounds online I like and I am using safari internet and when I go to save the backgrounds and things I do all that then open the picture and right click on it and set it to desktop background but everytime I do that some of the background is cut off, can anyone tell me what I could do to fix this problem?How to change the size of a desktop wallpaper?
You need to re-size the image to match your desktop. If you are downloading 1024x768 (4:3 Ratio) for a newer LCD monitor they will many times not fill your desktop, or will distort the image...



If you have your desktop set for 1920x1080 (16:9 ratio - 90% of new 22 and up LCD monitors are this ratio) then you want a 1920x1080 image. Download the right size image or use your graphic software to re-size the images you are downloading...



The free gimp software runs in Linux, Mac, or Microsoft operating systems and it is easy to use for expanding or cropping your images to fit your monitor. Read the review, download and install - I have included the Microsoft operating system download link, since you did not indicate what type of operating system you are using.

http://download.cnet.com/GIMP/3000-2192_鈥?/a>



Gimp Tutorial sizing/cropping images

http://www.gimp.org/tutorials/Lite_Quick鈥?/a>



If you want more formal instruction, a copy of Akkana Peck's book ';Beginning Gimp From Novice to Professional second edition'; should be in your local library...

http://www.amazon.com/Beginning-GIMP-Nov鈥?/a>