From the Chords page you can select the Chord, Chord Family, Root Note, Instrument and Tuning as shown in the Navigation section. When any of these are selected the Auto tab configuration is reset to default and the algorithm is executed generating a new set of tabs. The fretboard will also be reloaded with the current instrument, tuning and chord notes. The default configuration is discussed in more detail in the Auto Mode help section.
In the middle of the Chord page additional information is displayed about the current Chord.
The details section includes the chord notes, the chord formula, alternatives names of the chord and a subset of formula notes that can be dropped from the chord when generating tab diagrams. For example the Maj11 chord has 6 notes. If you are generating tabs on 4 strings then the configured drop notes can be silenced in the chord by turning the notes OFF. The Drop Notes are just a recommendation. You can choose which note(s) to drop.
When you select a new chord the default tab configuration will automatically turn OFF the recommended drop notes so that it can generate tabs across 4 strings. This is done to show standard chord shapes using drop 2 or drop3 voicings which is common in jazz guitar. It is common practice to silence notes on complicated chords for many reason not the least of which is playability.
At the bottom of the Chord page is the Annotation and Signature buttons.
Click on the Annototation button to show the Chord Notes ae either a string of notes (C E G) or the formula (1 3 5). Clicking on this button will force a redraw of the Tab page and Fretboard page to display the notes as either a formula number or a note symbol.
Click on the Signature button to show the Chord accidental as either a sharp (#) or a flat (b). Notes (C E G) or the Chord Formula (1 3 5). This forces a redraw of the Tab page and Fretboard page to display the note accidental as sharp or flat. For example C# or Db.
The accidental (b/#) does not affect the Chord Formula displayed. For example a Maj7#5 will show its formula as a 1-3-#5-7.