To switch the system on/off: Press longer the right button
To activate the display: Press the right button or tap on the touch-sensitive area
To select a feature: Tap with one finger to open or select a menu item
To get back/previous screen: Slide to the right for activity menu or Slide to the left for main menu
To visualize your activities: Slide your finger to the right to view activity screens
To visualize your notifications: Slide up for notifications and slide down for shortcut
Good to know:
If you want to change your ZeRound watch face, press rmly on the current watch face, swipe left or right to go through the different watch faces available and tap on the one you want to select and use