How do I change my fire mode on Fortnite mobile?

When you first sign-in on mobile, you are given the option to select your fire mode. After that, you can change your fire mode from within the Touch and Motion Settings accessible from the menu. Detailed steps are below:
  1. Tap your profile icon at the top-right corner of your screen
  2. Tap Settings (Gear icon)
  3. Tap Touch and Motion (the icon with a hand pointing to a circle)
  4. Tap Fire Modes
  5. Modify the settings under FIRE MODES
  6. Tap Apply