Doug,do you have the hook2 5 or the hook2 5x? Any x models do not have split screens.I have hook2 5x.Turn on go to top left button press once is sonar, twice is flasher,three times is downscan.You have to go through this sequence every time you turn unit on.When I first turned unit on in simulation mode,my downscan mode was green,a few minutes later it was blue and I can’t find a way to change back to green.Even when I hit palette button.