Dual range and overlay

I have TZT units and a DRSa12Kw Radar unit. I have not been able to get dual range. When I am on the radar screen and press the control button and scroll to display I do not see anything that says dual range. I have tried everything and cant figure it out. Any ideas?

Also for overlay. I see the option but it is not highlighted so I cant click on it. Any idea on this as well?

You will need to create a display screen with dual range radar.
If you watch the video linked below you will see the instructions at about 6:36 minutes in.
https://www.youtube.com/watch?v=LHkaTRaJjSc#t=414

Radar overlay is only available if you have a heading sensor connected into the system. Often this can be accomplished from an autopilot if you have one. If not a separate sensor needs to be connected.