Customizing Dimmer groupings




I was wondering if it is possible to organize my channels like in the tutorial. 

In my theater, I have channels 1-10 on a row, 11-20 on another row, channels 40-60 are on a cat walk, and 90-100 are house lights. 
I want to be able to select my channels, and then in the live table, add a name above channels x through y as name z. 
Is this possible? In the tutorial, I see he has channels 1-6 labeled as dimmers, then farther down, he has the word "unpatched" labeled above some channels.

I hope what I am asking for exists, and makes sense. I've been awake for 4 hours, and I just want to see if I can get a general question as of now. Tomorrow morning I'll revisit this and make adjustments. 

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