In the upper right corner of Universal control, to the left of the FAT channels is where one can add phantom power, change mic polarity, select Main, or A-B-C-D. Place your cursor to the left of the little gear icon and above the 48v---Ø---∞, When you left-click, the text window and cursor will appear for you to add text. Then in the Settings menu [click the gear icon in the upper right corner, not the one you just clicked to edit the text. Under "Appearance" you can click "Colorize Channels." You can also chose different display options under "Channel ID."
I hope this helps. I am quite new to this as well.