Step 1: Open your gallery.
Step 2: When you find an image you would like to favourite, click the heart icon on it.
Once the image has been favourited, it will have a heart icon sitting in the bottom corner:
Step 3: Repeat the process for all images you would like to favourite.
To view only your favourites: scroll to the top of the gallery and click this heart icon: (next to the other action icons).
