Lighting schedule : How can I add a column that I can type in content freely

[Sally yang]

Hi all, 

I have created a lighting schedule for landscape lighting design. I'm using Vectorworks Landmark. I would like to add a column in the schedule so I can type in products specs. It can be quite different in each project so I prefer to leave a column in my pre-made schedule instead of filling in prescribed specs. However, I found the column is automatically linked to data and I cannot type in anything ... Are there anyway to remove that sort of link just for that column? I noticed the little triangle at the start of the column controls the setting but I haven't figure out where to remove this type of link. 

 

Anyone had experience?