In the manual, under Common MIDI Editor Functions we read:
Coloring Notes and Events
You can select different color schemes for the note events in the MIDI editor.
The following options are available on the Event Colors pop-up menu on the toolbar:
The note events get different colors depending on their velocity values.
The note events get different colors depending on their voice (soprano, alto, tenor, etc.).
Source: > https://steinberg.help/cubase_pro_artist/v9/en/cubase_nuendo/topics/midi_editors/midi_editors_note_events_coloring_r.html
Alright. Now I have a polyphony with two voices and would like to select them in Score editor based on the voices. When I click on the color I get bunch of color to select
. However in Key editor for instance you can select all the options in the page above
It is easy to recreate this. Just create a midi track in the score editor after converting the staff to polyphonic add some notes to voice 1 and voice 2 and click on event color.
Please see the attachments.