Harmony Settings

When you select in a chord in the Harmony parameter, you are actually editing a Harmonic Context that includes a lot more information than just a chord.

Chord
Pick a Chord from the menu or type its name right into the input field. You can type multiple chord names separated by spaces. There are many ways you can write a chord. Learn about the syntax here.
Extension
Pick a chord extension from the menu.
Bass
Transpose the bass note up or down. Hold down Alt for chromatic increments. Hold down Ctrl to reset to automatic bass selection. The bass need not necessarily be included with the chord.
Function Expression
Check this if you want to enter harmonic function expressions instead of chord names (Pro only).
Vertical Scale
Pick a Vertical Scale from the menu to use for building melodies over the chord.
Horizontal Scale
Pick a Horizontal Scale from the menu.
Relation
Pick a Relation key from the menu. Local key signature that would best match the horizontal scale (determines color).
Key
Pick a global Key from the menu.
Estimate
Estimates keys, scales and relations for the selected chords, assuming a common underlying key. Remember that different spans in a progression can have different keys (key changes). Hence you can select and estimate multiple spans independently. Alternatively call Transform > Estimate Keys, Relations and Scales from the main menu.

The result depends on your current Scale Selection Preferences.

Bass Menu
Pick a desired interval for bass. This is an alternative to setting the bass directly.
Inversion Menu
Pick a desired chord inversion to use for Auto-Chords interpretation and the rendering of green Chord Symbols.
This may not have an effect in case Interpretation decides to follow the setting of individual Figure segments instead.
Open Voicing: Enable this for open chord voicing. This only affects Auto-Chords interpretation and the rendering of green Chord Symbols.
This may not have an effect in case Interpretation decides to follow the setting of individual Figure segments instead.
Minor Seconds: Enable if you are fine with minor seconds to occur in chord voicing.
This may not have an effect in case Interpretation decides to follow the setting of individual Figure segments instead.
Alignment: Align the chord with the previous one. A very basic voice leading algorithm that smoothes out pitch leaps. In a long progression, you should disable this occasionally, as a sort of line break.
This may not have an effect in case Interpretation decides to follow the setting of individual Figure segments instead.
Override Harmony
Always use the Preview parameter, even if Harmony is available.