The Media Tray
All of the images that have been imported into your project can be found near the bottom of the program window, in a row we call the Media Tray. From here, you can drag your images to your pages. Note that photos already used in your project are marked with a check mark in the upper left corner.
You can preview photos from the Media Tray simply by clicking on them. A larger, high resolution image will appear in front of your workspace. Simply click on it again to have it return to the Media Tray.
Aside from a storage space for all of the images, backgrounds, or embellishments that you choose, the Media Tray also contains the Page Manager feature. By clicking on the Pages tab on the lower left, you'll see all of your current pages in the tray. This is a great way to jump to a particular page, or even rearrange the pages on the fly.
Add Photos and Hide Used
When looking for a particular photo or page, if your list is too long to see all of them on the screen, you can use the slider below the images/pages to scroll through them. There are also two arrow buttons on the sides of the Tray, that when clicked will scroll to the next section on the Media Tray.
If you want to reduce the number of images in the media tray to only those you have yet to use, you can click on the Unused toggle, to the left of the Media Tray.
The Add Photos button is what you'll want to click on to pull more images into your project. After clicking on the button, you can import images using the same process that you used when starting the project by navigating to where your images are stored, selecting the ones you want, and clicking the Add to Book button.
Note that images already in your project are not selectable this time around.
In addition to the green checkmark that appears on the image in the photo tray, you'll notice there are a few other options as well when you hover your mouse over the image. In the bottom right corner will be a red minus symbol that can be used to remove the image from the project. If the image has already been used, you'll also see an arrow in the upper right corner of the image. Clicking this will take you directly to the next page in the project that image was used on.