Using Drag and Drop
Change the position of photos in an album by dragging and dropping them into position. You can also drag and drop photos into different albums or collections.
To drag and drop multiple photos, select the photos you want to move by clicking the box in the top-right, then drag and drop them as a group to the new destination.
Showing Selected Photos
Use the View menu to see only selected photos in your Album. First, select the photos by clicking the checkbox in the top left of the photo. Then, select Show Selected from the dropdown.
Choose Show All from the same menu to display all photos as before.
Selecting All Photos
If you want to select all photos in your album or collection, you can do this without having to individually select them. From the Actions menu, choose Select All.