In your signature editing area look for the Size= bit and change that. Similarly the colour= bit will change the font colour.
[img]http://i19.photobucket.com/albums/b173/sarahperkins81/colsigpic.jpg[/img]
[font=Arial][size=1][color=green]I haven't failed, I've found 10,000 ways that don't work.
Thomas Edison (1847-1931)
[/color][/size][/font]
Stu