(automatically?) coloured items

Hello,

What do the coloured items mean in the following screenshot?
https://www.dropbox.com/s/mom95wv8z6tzqzt/Screenshot%202018-12-20%2007.32.47.png?dl=0

I cannot remember how I did get this.

Thank you in advance for your help!

View Voice Colors

These are voice colors. View > Note and Rest Colors > Voice Colors
Each voice/stream has its own color.

EDIT: You beat me, Dan, but I leave my post as there’s a tiny bit of additional information. :wink:

At the first glance, I thought they are the voice colours.
However, I repeated “Change voice to the previous voice on staff”.
Thus, they must be the first voice.
It is really strange.
How could I confirm the voice number?

Dorico counts voices per instrument, not per staff, so there are actually two voices on the marimba grand staff.

Better to change voice to a specific voice from the list of available voices in use, such as Upstem Voice 1.

Thanks!