Add Photos to an existing Gallery by clicking the appropriate icon. From here, click on the icon on the top of the page that says SELECT PHOTOS. Browse your computer to find and select the pictures you want (you can choose from multiple folders). Now, click UPLOAD PHOTOS. You will see a bar to the right of each photo name that tells you the % (0 to 100) of your photo upload. After all the photos reach 100%, you can edit the photos. You will NOT get any kind of pop-up notification when all the photos have been uploaded, so it is up to you to make sure that all photos have reached 100%. You can leave the room, but don’t close out the Control Panel while your photos upload.