There are 3 ways to favorite the channels that are important to you.

1. Navigate down to the Add to Favorite button on the TV screen and press on it.  

2. Long press (hold in for a couple seconds) on the remotes center/select button while the channel you want to add is highlighted. It will add a star to it letting you know it's been added successfully.

3. While the full screen menu is up click on favorite. Learn how to bring up this menu.

4. You can also favorite movies and series too.  Simply long press on the movie or series poster until a star appears. 

5. Or navigate to the star icon when the movie or series is selected.