Let me restate - I have been actively using nanoVNA for about two weeks -and I am a certified engineer and real engineers do not read manuals...Consequently I make mistakes , because I only readwhat I IMMEDIATELY need...With that said - I find the wast variety of "menu flowcharts " .disgusting.It looks as the primary goal was to cram everything in minimal space...What happen to real (IBM) style flowcharts ?GUI ( graphical USER interface ) Pitiful.Any nanoVNA " coders " ever hear about "tool tips " ?How about " document header(s) " levels?In my years of gainful employment I did "(graphical) user experience "quality control...(some "coders" did not like me ...)and if anybody is going to say " what do you expect for free ..."I AM DONE HERE