The “answers” to Music Theory questions are rendered as dots on the Virtual Fretboard. The dots represent locations on the fretboard for a given note (i.e. where to put your finger on fretboard). This is an interactive tool, so go ahead and experiment, and ask Music Theory questions (use the web forms). You might learn a few things about notes, intervals, scales or chords and get a better understanding of the guitar fretboard.
You can use the Display Options to change and explore the fretboard view. Hand Preference allows you to specify right or left hand. The Guitar Perspective lets you view the virtual fretboard as if your guitar was in your lap or if you were facing another guitar player.
There are also options for Tuning (standard and alternative / open tunings), fret / hand Position and Width (how many frets to utilize, for note display). You can also choose to Include Open Notes (yes/no), or allow specific Allow String Selection (default is all 6 strings).