I'm looking for a bit of assistance with my Humminbird 561. I have misplaced the manual and CD that came with my finder, and the Humminbird manual site seems to be down.
How does one use the Dualbeam function? Does it only work in split screen or can I use the wider (lower powered) sonar on the whole screen? I don't see a menu option for toggling between.
Thanks,
Ron
