SolidWorks Electrical Title Block

I have question about SolidWoks Electrical 2015. I want to make new title block format. And I notice that I had predefined tag line ##PROJECT_CREATION_DATE, #PROJECT_TAG and so on. On the project manager I add some user specific fields. So I wan to ask how to put it on my title block. For example I added the field "Sub contractor" in my project properties. Can I access it in title block ? I try to do something like #subcontractor but nothing happens. So can I define my tag and if yes how to access them ? Thanks in advance !

SolidworksDrawings And Detailing