For default setting, the side menu will be hide on Homepage, and user can swipe from either left and right side to call the Side Menu buttons.

Swipe from either left or right side to call Side Menu buttons

To make the Side Menu buttons always-on, the option in the settings needs to be disabled.

1. Settings
   Open Android Settings from Homepage
   
2. Disable Sidebar Gesture Switch
   In System, disable Side Gesture Switch option
   
3. Side Menu Buttons
   Now you can see the Side Menu buttons is always-on