Well I was trying to look this up through Google but didn't find anything, but then I just got the invite for this beta, so I might as well ask here :) I'm trying to export individual layers in Photoshop as PNGs, keeping their size. So if I have a layer that is 200x200 in a composition that is 1000x1000, I want to export just that layer as a PNG at 200x200. Possible?
I'm not sure this question is on-topic, but it's the first question on the site, so here we go:
What you're looking for are layer based slices.
If you have overlapping layers, which you will have more often than not, you might have to repeat the process a few times, hiding certain layers each time.
I'm not sure I understand what you're trying to do, but when you say your composition is 1000x1000 do you mean that the canvas is actually that size?
One thing you can do is :
There are scripts for this if you have an insane amount of layers, but an initial Google search didn't turn up a whole lot of these.
Solution number 1:
Draw a Marquee selection around the element; choose Edit → Copy Merged File → New; hit Return; “Paste.”
now you have your element ready to be saved in png format
Solution number 2:
right click on the layer (or group of layers) choose to duplicate the layer (or group) choose New as a destination
and you get a new document with your layer(s)