1. Select the desired photo by clicking on it
2. Click "Create" at the top of the window and select "Make a Poster" from the drop-down menu.
3. You can enlarge your poster by selecting a size from the "Poster size" menu.
4. Select your paper size and check or uncheck "Overlap tiles." When enabled, this feature will cause the image on each sheet to slightly overlap, making it easier to line them up and attach them later.
5. Click "OK."