Back when I was using Inventor I could define a global parameter and then use that in my part or assembly's title. This came in handy when you had multiple configurations of the same part that were only different in length. You'd define a parameter line "Length=4" and in your part's title dialog box you'd say something like

Pipe, SS, 1/4" OD x ["Length"]

I've tried looking up "using equations in Title" but that hasn't really helped.....

I'm trying to find the same way to do this with SW but once again I'm trying to find the "translation" from Inventor to SW!