The reason I had it on that setting for that shot is I also run a Lowrance Hook 5 on the front just under the Mega 9 and run both transducers off the front of the jon boat attached to Po Dunks Da Ducer and I have the 5 set to show lake map and sonar in split screen. Had to set the 9’s sonar to the setting shown otherwise it would have shown some interference from the 5 transducer. Most of the time I just run the Mega 9 set to SI DI split screen or single screen HD. My plan is to get a larger screen Mega and do away with the 5. Love the Megas!