i have talked a lot about the lx-6/7/9. they are the same unit other than size or with a camera, so they all work the same.
it has 3 problems and 3 work rounds (sort of). one being ice mode doesn't work (why did they bother adding it if its broken?), so use open water mode. next is auto lock for depth doesn't work (again, why did they bother adding it if its broken?), so you use dynamic manual or manual. last is a blind spot from the bottom of the ducer to 3 feet under it (don't they feild test any more?). make sure you only have an inch of the ducer in the water. the work around is fish thick ice (sad to say), but true story. does make for easier fishing for sure!
marcum knows of all 3 MAJOR PROBLEMS and has NOT fixed them. we are all hoping they would with a firmware update, but no dice and they had all summer again to fix them. i know they read these posts too.
as for display, i use the chart/graph on the left half and the normal vertical and zoom vertical and when i want to see how large of an area it can see i use the dash board.
set the ping to 1/slowest rate for the chart/graph. start cranking up the gain until you see a bottom in red. try to see your jig and turn it up more if you can't. you have to adjust the depth your trying to lock onto. the zoom has infinate coverage and is super handy. you'll want narrow/8 degree cone in deeper water like over 10/15 fow.
some more info here. if you run it thru the search it will give you more, like where i gave all the numbers to adjust it ect.
http://www.iceshanty.com/ice_fishing/index.php?topic=315335.0