Rebel T3i

[francis]

trying to take a picture that has been taken and enlarge/resize so that it will be closer, then save in enlarged size.

[jfo]

Here are some resources to help with that:

http://www.irfanview.com/

http://www.gimp.org/downloads/

[BrickR]

Sound like you're just cropping a photo.

[davepjr71]

The software that comes with the T3i will do that for you.  Just about any program will.  You may want to use the software to increase the sharpness to max since may start to get hazy as you get larger.