How do we re size a file?

[Just Hanging]

Can anyone share how to re size a picture manually, so we can post them here?

[Tomato]

For example
convert -scale 50% inputfile outputfile scales the image to 50%. Instead of 50% any geometry can be set.

[Just Hanging]

Still working on it.
Any more advice?

[BoxedBalls]

Grab a copy of gimp (it's like photoshop):

http://gimp-win.sourceforge.net/stable.html

Then use Image->rescale.

Just a note:
'convert' is the ImageMagick program, it works on the commandline (DOS).