Add roman numeral notation


Feature Toolbar Icon Default Keyboard shortcut
Roman Numerals Text Dot Ctrl + Shift + K or + Shift + K

What is a Roman Numeral Analysis?

Roman numeral analysis is a way to represent chords based on the key signature. The roman numeral is the degree of the key that serves as a root for the chord. For instance if you use the key of C, the first roman numeral I will be a C. The II will be a D, the III an E and so on.

Here is an image of the complete C major scale, with both notes, jazz and roman numeral notation.

C Major Scale

Getting started with Roman Numerals on Flat

To start inputting chords below your music notations, focus the note where you want to start adding your chord, then open the “Text” toolbar and click on the Classic Chord icon or use the keyboard shortcut Ctrl/Cmd+Shift+K.

A text field will appear at the selected location where you can start writing your roman numerals, a suggestion box will then show up recommending chords related to the input.

Inputing Roman Numerals

Chord Kind

Here is a list of all the chord kinds (major/minor/diminished…) available on Flat. For the sake of simplicity, we are writing those with the first degree (I), but it works the same way with all other degrees.


Chord type Text input on Flat
Major triad I
Minor triad i
Augmented triad Iaug
Diminished triad idim

Seventh Chords

Chord type Text input on Flat
Dominant I7
Major 7th Imaj7
Minor 7th i7
Minor Major 7th imaj7
Diminished 7th idim7
Half-Diminished 7th ihdim7
Augmented 7th Iaug7


Here is a list of the inversions available on Flat, for the first degree (I)

Triad inversions

Inversion type Text input on Flat
No inversion I
First inversion I6
Second inversion I64

Seventh Chords Inversions

Inversion type Text input on Flat
No inversion I7
First inversion I65
Second inversion I43
Third inversion I42

Special Chords

Chord type Text input on Flat
Neapolitan N
Neapolitan sixth N6


Neapolitan chords are built from a major triad, whose root note is the lowered second degree of the scale. Neapolitan Chords In this example, we are in the key of C. Thus the root note of the major triad is a D flat.

Secondary Dominants

Secondary dominants

To input secondary dominants, you need to first input the secondary dominant, add a /, then input the target chord. Like V7/IV.

Chords Keyboard Shortcuts

Go to the next chord or Enter
Go to the previous chord
Exit the Chords mode Esc

Future work

We are working on adding altered roots (#VI), Augmented 6th (It/Fr/Ger+6), and figured bass notation.

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