The easiest place to choose your favorite images is the Catalog View. This is because you can compare images to each other.
In the Gallery View, you can favorite a photo directly on the image thumbnail. When you hover your mouse over a thumbnail that is unmarked, a small outline of a heart appears in the lower right corner of a thumbnail.
- Click a Shortcut in the Library panel or choose a Folder, Subfolder, or Album for the images you want to work with.
- Press the G key ensuring you are in Gallery images mode.
- Adjust the thumbnail size with the zoom controls so you can easily see image details.
- Now you can apply an image flag directly on the image. Click the hollow heart in the lower right edge of each thumbnail, The heart can be toggled on or off with each click to mark Favorite or Unmarked.