There is a program called Irfanveiw (free) and all scrollers should have it.
GOOGLE Irfanveiw
Make sure you download it from the Irfanveiw site so you don't get piggyback software.
Load all of the plugins to get full use of the software.
This program is made by a talented guy from Bosnia and he even has a forum to get help.
With this program you can delete the grey watermarks from clipart by going to IMAGE and decrease color depth.
It is easy to crop pics and resize.
You can Rotate, Resize, Invert and many other-things.
Try it and let me know how you like it.
Bob