Connections on back of unit, looking overtop of it with the front panel facing you, described from left to right:

Microphone and line combi jacks three through eight.
Line outputs, paired vertically: 1/2, 3/4, 5/6, 7/8.
on top, optical connections, 1/2 in, 1/2 out.
Below optical in 1: Word clock output.
Below optical out 1: USB C 2.0 connector.
Power socket.

front panel, described from left to right:

Inputs 1/2 (each can be microphone, Line or Instrument).
Channel input buttons, paired vertically: 1/2, 3/4, 5/6, 7/8.
48V phantom power, instrument level input (note that these two buttons follow straight after Input 7 on the top row).
Below the last two buttons is Smart Gain, long oval button.
Screen.
Multi-function knob: labelled "main volume control".
To the right of the knob, top button is Main output select, bottom is Programmable function button.
Two right-most buttons on top row, left selects headphone 1, right selects headphone 2.
Below those, headphone jacks 1/2, left to right.