Personally, I'd opt for the DI image to take up the left half of the screen, and split the right half with the 2d image & map data. In water of 15' or less, your 2d cone should be set to the 200kHz option ... and I'd set the DI option to 800kHz (for a sharper image).
My Lowrance Elite 5 DSI unit is Down Scan only (no 2d sonar) ... and even though I've only had 2d sonar units for the first 40+ years of my fishing career, I don't miss it one bit, now that I can get images like these:
Attachment 169944
Attachment 169945
... cp :kewl

