Simple when you start a new file click on the button all the way at the bottum of the new file dialog - it'll make the background transparetn.
If the file is already created then just create a new layer and it will then let you drag the background layer to the trash in it's window - that'll take care of it, but when you save it as a pct the background will turn white. And if you save it as a png then you need to create an alpha channel for it...
Aplha channel creation...
1 - do all your art on one or many layers.
2 - link them when done by clicking the little box next to the eye.
3 - in the layer window select merge linked
4 - you should be left with one layer now press command and click the remaining layer - this will select it preserving it's transparency.
5 - then open up the channel window and create a new channel, by clicking the triangle the same way you do to create a new layer, it'll automatically name itself alpha 1
6 - make sure that the background color is white
7 - select the alpha 1 channel
8 - hit delete and save as png
I gave such you the long directions so that you learn how to work with alpha channels as this will come in handy.
I have a problem which is that my png's show up too dark when opened in coldstone - you have to fix this by setting the gamma to 1 I believe, but I don't see this option anywhere. Anyone that can help or has figured it out let us know!
Also, you'll soon learn when working with photoshop there are MANy different ways to accomplish the same thing - that's one of the great things about that program - I've used it for almost 5 years and still find things that I didn't know where there or could be used for a certain effect!
I hope I helped!
------------------
Here's my site! There is art, music, movies, and games are on there way!
(url="http://"http://www.sinthesisent.com")http://www.sinthesisent.com(/url)