need help printing from A540

I'm enjoying using my new Powershot A540, but I'm unable to figure out one element of the software printing program - ZoomBrowserEX. Specifically, how do I change the dimensions of the image I want to print? I'm using an HP printer with 8.5 X 11 paper, and I cannot figure out how to print anything other than full size (almost as large as the paper). I would like to print in smaller sizes -- 5X7 or 4X6 for example, but cannot seem to find how to re-size the image.

I appreciate the help!!
Thank you.
DJ

You will have to crop your images to fit the different paper formats. Typically I crop my images in a photo editing program. Depending how you have composed the photo, you may not have the photo the way you envisioned it. Each different format (4x6, 5x7 and 8x10) require a different crop.