Yeah... 4... while built on the bones of SH3, is NOT like 3, in that regards where it comes to sonar use by the skipper.
Being able to click on the sonar dial face to move the sound head about... was doable in 3.... NOT so, in 4...
The end result is... don't expect to do what was doable in 3, with sonar, to be doable in 4 in that department, at least... as far as I know of, yet... operative word that... YET.
M. M.