Arranging : Time, Tempo, Meter, Key, and Chords : Key Signatures

Key Signatures
For more information, see the following topics:
The Key Signature ruler lets you add key signatures to Pro Tools sessions. Key signatures can be imported and exported with MIDI data. This is especially useful when exporting MIDI sequences for use in notation programs like Sibelius (see Exporting Sibelius Files). The default key signature is C major.