This Paint Shop Pro 5.0 Tutorial attempts to explain why we should save images (that we use repeatedly) in psp format. Let's say that we create a button for a webpage that has a white background. The button would be anti-aliased to white. Now we want to use the same button on a black background. To fix it in PSP 4.0, we would have to select the white around the button with a high tolerance and a little feather to change the white to black. Now the button is smaller and if we had had an anti-aliased edge (like PSP 5 does) rather then a feathered edge (like PSP 4 does), it would be ruined. What we will do is save our button with a transparent background. Understand that this transparenency is absent of color, not like a gif with a transparent color. Color is not involved and that's the point. We can take our new psp button and paste it onto any background color or texture and it will always be perfectly anti-aliased to that background. It's like a mask except it's 16 million colors not 256 grey scale.

	To begin, open a new image 200 x 400 x 16 million colors. On the "New" window click the "background color" arrow and select "transparent". Load or draw a selection. I have a saved button selection. You can get it here. Unzip it to any directory and load it by going to "Selections" > "Load from Disk".
	For this button ... Goto "image" > "effects" > "cutout". Uncheck fill interior. Set shadow color to black. Set opacity to 90 and blur to 7. Set offset to -3 by -3. For the next step, insure your "layers" window is showing by clicking the layers button on the main toolbar.
	Click the "Add New Layer" button in the lower left corner of the "Layers" window. On the next window, accept the defaults by clicking OK. The new layer will be active. Load the same selection onto this layer. Apply cutout again but with shadow set to white and offset set to 3 by 3. Goto "Layers" > "Merge" > "Merge Visible". Save as "button01.psp".
	To use it, copy it to the clipboard "Edit" > "Copy". Open a new image and paint it with your favorite background or color. Paste the button on top "Edit" > "Paste" > "Paste as New Selection". Deselect all. Add text or what ever. Enjoy!