Creating a Photo Gallery
Remember to export photos from Photos to provide an easy-to-use file size that is cropped appropriately. Large size is great for web galleries, medium if you have a lot of photos, and small is good for articles and blurbs. The new photo options allow photos larger than 600 to be displayed. Photos can easily be added from a folder. Export your photos into a folder, select that folder and upload all at once.
Remember: A single photo does not constitue as a photo gallery. Instead, single photos can be added to an article or a blurb.