Click on an image to view a larger version then click box in upper right corner to select images. Once you have made all of your selections see the icons in the upper right corner. Click the 2nd icon to dim all of the unselected images, click on the click 3rd icon (Lights off) to view your selections only.
In the larger view, you can click on multiple images to compare side-by-side, click and drag in the box to the right to move, enlarge or reduce the preview. Click icon in the left corner or center icon in the box of the enlarged preview to download that image to your computer.
Click the envelope icon in the upper right corner to jump to response form to email your selections to the photographer, if other versions of the images are needed.