Centering?

Hi, I've used photoshop 7 for a while, yet I have not found a way to find the center of an image. Is there a way to do that? Such as if I were going to put my sig at the bottem but centered on the image. Without it looking... lopsided. Thanks for the help.

-Sali

You can align things to the centre of an image if that's what you want to do.

Select the layer you want to align somewhere and link it to a lyer which takes up the whole image (not a background layer though), select that layer and choose the arrow tool, now you will have the align options at the top of the screen.