If you want to change what modes the ①, ②, ③, ④ buttons trigger on your lights, you have to edit the "favorite modes" of the room the lights are in. To do so:

• Open the Settings page (button at top right corner of the home screen)
• Tap on Rooms
• Select the room in which your lights are located
• Tap on the mode you want to edit. You can select any light mode, custom white, custom color, or a Scene