When enlarging canvas size, PSP will use the background color you have selected to fill the new space. If this turns out to be a different color than you expected, you can use the Magic Wand to select this new blank area and fill with another color or leave as is. We'll be adjusting background color in one of the following steps!
Now we're ready to add our signature and we can do this either in Paint Shop Pro or Animation Shop. The advantage to adding text in Animation Shop is that you can use the Onionskin tool to assist in keeping text perfectly aligned within each frame. The disadvantage is that Animation Shop does not provide all the text effects found in Paint Shop Pro, such as drop shadow. If you want to continue working in PSP so you can add text with drop shadows and other effects, skip the next step and jump to Step 7. Warning! The steps involved in aligning layers in PSP can get a little fussy, so if that's not to your liking it'd be best to use Text tool in Animation Shop and continue with Step 5.