How to Create a PMI Perimeter Dimension
Solution1. In an existing sketch, create a Perimeter dimension.
2. Exit the sketch and in PMI, select 'Note', then the Expressions icon in the ribbon.
In the Expressions dialog, select the Perimeter expression -OK.
Back in the PMI Note dialog, enter additional text as needed "Perimeter=" and place the dimension where needed.
Note: This is associative. If the Perimeter expression is edited this note will update.