Canon EOS C300 Mark II
Record Start/Stop
Zoom Telephoto
Zoom Wide
Iris - Auto/Manual
Iris - Push Auto Iris
Iris - More Open
Iris - More Open Fast
Iris - More Closed
Iris - More Closed Fast
Focus - Closer
Focus - Farther
Focus - Magnifier
Menu
Up
Down
Left
Right
Enter / Execute
Assign 1
Assign 2
Assign 3
Assign 4
You can also use many camera functions through assignable buttons.