How to pick favorites: 

1. When in your gallery, in grid mode, click on the hearts at the top left of the images
2. A Favorites folder will automatically be created called "my selection" 
3. Click the “my selection” button on the top left of the page
4. You’ll be taken to a new window with a folder containing all your favorite images
5. Click the “share favorites” button on the top right of the page and choose “send to photographer”