H just created a banner in PNG format and I'd like to render a GIF in the center. So the output would be a GIF file where the center moves and the rest of the PNG is made into static frames. I've only done basic things in photoshop and never worked with gif files. Thanks in advance.
Image formats are all or nothing. You can not mix and match formats within the same image.
Your entire image must be either a gif or a png, it can't be both.
The only way to use multiple formats is to use multiple images. If feasible, you could code html so that a png sits on either side of a gif, but you'll need 3 images.