Choose the object and place it with the Diagonal option.
First place the anchor point and then stretch to the opposite corner. The object show 2 dimensions and the name of the zone. You can also choose to show the dimension in another way.
Options for alignment and the content of two lines of text.
The dimensions can be formatted just like the regular dimensions.
You can show this element in sections or 3D.
The objects can be scheduled
Also take a look at our Zone Extension Assesory tool for automatic zone dimensioning.