What Does this box mean around a heading and its text?.

[Joanne Bombardier]

I am trying to teach myself how to write templates for a program called Advice OS from Midwinter.



In one of their default templates they have the a ?field?section?heading? I don't know what its called.

Where they have a heading, when you hover over it it comes up with the name of the heading and makes a box around the contents.

When I create headings they don't have this box.
is there something you need to do to create it? or is it because their template may be written in an older version?

The two pics below reflect their heading when hovered over; and my heading when hovered over, respectively