I’m not really sure if ERD is the proper term, but occasionally I see diagrams created where the line in between two entities is labeled with text to describe the relationship.
For example if I had User, Item, ItemRating, I may want to describe the line between User and ItemRating as “rates” and the line between Item and ItemRating as “is rated by”.

I found I can make a text object in mysql workbench, and place it where I want, but I can’t find a way to attach it to a line so that it moves with the line if I rearrange things.
using mysql workbench 5.2.3
I wanted to do the same thing but haven’t found a way. I don’t think it can be done in Workbench. I’m using 5.2.34.