How to hide all layer except one in photoshop cs5.5?

I Only want to operate in one layer. I want temporarily hide all other layers.

2 Answers

Alt click the layer's eye that you want to show and all the other ones will be hidden.

Clicking again with alt will invert the same action.

By checking layer eye on/off, this will hide layers one by one.

you can hide/unhide any layer in photoshop