Download Helix owner's manual here: https://www.humminbird.com/support/manuals
if you have not already done so. A lot of info is in there. As I just recently purchased a 5 myself,
the only other 'tidbit' I can offer, is that menu options vary depending on which screen you
have active at the time you press the menu button. I like this unit - the 'horizontal' screen orientation
shows a lot of real estate and you get gps, basic mapping including the ability to get other map cards
to use in the micro sd slot and it was Cheap. Hope this helps - sorry if too general ...