On your Fusion 2
Swipe to the left of the time/date and battery % screens to select Apps , then scroll to the second Apps screen to select the settings icon . Swipe to info (i) and tap to select, and then swipe to see the SW xx.xx screen.
In the App
Tap the gear icon on the gray device banner found at the top of the app home screen, then scroll down to select 'Debug Info'