Rootnote and Chord/Scale Type Selection
This section at the top displays the current rootnote and the selected chord or scale. The user can interact with this area to select from different musical scales or chords to visualize on the fretboard. The rootnote is selected in the Magic Notebar (see below)

Chord/Scale Selection
Tapping the header part of the interface opens a menu where users can browse and select from a comprehensive list of chords or scales. Once selected, the fretboard updates to display the chosen chord or scale.

Favorites
The star icon allows users to mark scales or chords as favorites for quick access later. This feature is beneficial for users to keep track of their most-used or preferred scales and chords.

Magic Notebar
By tapping a note name in the magic notebab, users can quickly change the rootnote. It’s designed for ease of use, enabling rapid changes to the displayed scale or chord on the fretboard.

Flat/Sharp Rootnote Switch
This toggle lets the user switch the rootnote labels between flat (♭) and sharp (#) notations. This is particularly useful for learning and comparison purposes, especially in genres or musical contexts where one notation is preferred over the other.

Settings Access
The settings gear icon provides quick access to the app’s settings, where users can customize their learning experience further, adjusting visual aspects, sounds, and other functionalities to suit their preferences. (see below)

Playback Controls
This section includes controls for starting or stopping playback, setting the direction of playback (ascending, descending or both), choosing octaves, and adjusting the playback speed in beats per minute. It offers an interactive way to hear how the selected scales or chords sound.

Note Labels Switch
Users can switch the note labels to various modes such as Enharmonic, Easy, Function, or None. This helps in understanding the theory behind the fretboard, showing the musical function of each note within the scale or chord, and also allows for a cleaner display without labels if preferred.

The settings dialog in the screenshot provides users with various customization options for the FretBoard Evolution app:

Instrument Settings
Selected Instrument: Users can select from over 150 instruments and tunings to display the corresponding fretboard layout. The tuning of the strings is displayed below.

Sound Settings
Selected Sound: This allows users to choose from 17 different sound profiles that will be used during playback.

Display Settings
Invert Strings: When enabled, this option inverts the string order on the fretboard display, which can be useful for left-handed players or for mimicking the perspective of looking down at the fretboard while playing.
Fret Numbers On The Left Side: This toggle determines whether the fret numbers are displayed on the left side or the right side of the fretboard.
Swap Nut: This setting changes the orientation of the fretboard display to suit the user’s preference, either mimicking a left-handed or right-handed guitar.
Dots On Frets: When enabled, this feature displays position marker dots on the fretboard, similar to the physical markers on the neck of a guitar.

Background Settings
Background Image: Users can select a background image for the app. A nice selection of 19 backgrounds are available, carefully selected to be non-distracting. This feature allows for a personalized visual backdrop within the app.