This tutorial goes through the home screen and how to customize it.
INSTRUCTIONS & INFO
Swipe right from the clock screen to view notifications.
Swipe down from the top edge of the clock screen to view the Moments bar.
Swipe up from the bottom edge of the clock screen to view the Apps list.
Swipe left from the clock screen to view the Widget Board. A maximum of 5 widgets can be used at one time.
To add a widget, swipe left until an empty screen appears, then tap the Plus icon and select the desired widget.
To remove a widget, touch and hold your finger on a widget until the remove icon appears in the top right corner. Tap the Remove icon to confirm removal.
From the clock screen, touch, then hold your finger on the middle of the screen until alternate clock screens are presented. Tap the desired clock face to set.