Posted 08 February 2010 - 09:58 AM
Hi Nana B, I'm sure that someone will come along who can explain this better, or correct me if I'm wrong, but I'll tell you what I've figured out so far. lol
pngs fit in the category with jpg, psp, pdf, psd, etc., which are all ways of saving a document, photo, etc. You usually save your LO with your program extension - mine is psp. The reason for this is that it can be saved with layers and you can go back and work on the layers. Your end result is saved in jpg, in order to print or with a smaller size, to upload to ScrapGirls.
templates, overlays, papers, embs, etc are items that you use to make your layouts pretty. They are usually saved as jpg's, png's or psd's for scrapbooking purposes. As mentioned before jpg is for the finished project and your software extension is for working on the layers.
A png is saved with a transparent background, or section of it transparent. You can not save anything transparent as a jpg. Embelllishments, overlays and lacy papers, etc are saved as png's, so that the white around the item doesn't show up and make it look like a photo of the item. If you were to save an overlay as a jpg, it would become a paper and lose it's transparency, which in turn would change the effect that you want when you overlay it on your paper.
As for treating png's like papers, if you are asking it the colours can be changed, or if they can be blended, etc, like papers, then the answer is yes. After using your selection tool, you can add paint colours and use blends, you can just use different layers and blends, or you can grey scaled them and recolour them. I've found that it's the use of layers and different blending modes that make the colours pop! Just for fun, grab a flower, emb and drag into your software window. Make three layers and change your top layer setting to overlay. Now on the second layer, put the setting as difference and see what happens, then change the middle layer setting again and again, to see what happens.
I have to stop before I end up with a novella. lol I hope that this information helps a bit. I'm sure someone else will come along who can helpf more. :-)
My play tools are: CS5.5, PSE9; PRE9; PSPX2, on a Laptop PC, with Win7