The fretboard in Fret Sage is a representation of the whole guitar fretboard. Which is interactive to allow users to turn on and off notes as they see fit.
At its base it is as simple as left clicking to make a locations note visible and right clicking to not display that note.
The image above shows the fretboard in a state where all notes are being displayed. Basically a map of the whole fretboard.
This however can be very overwhelming to many, including myself. There is so much going on that it can be hard to see the forest through the trees.
This is the initial reason I created fret Sage for myself. I wanted to be able to get a clearer understanding of how things connect without all the clutter fogging things up