There is currently no approach to add a suffix to the entire dimension type; this is currently an instance override applied to the dimension element.
Also, while you can select all instances in view \ project you cannot double-click to edit the text while they are all selected. Unfortunately you need to deselect and do one at a time.
The only approach I’ve found to get close to the desired result is to apply a suffix override to one dimension line, then use the Modify > Copy tool to move it to another element. It will maintain the suffix with this workflow:
There is currently no automatic approach to add a suffix to the entire dimension type; this is currently an instance override applied to the dimension element.
Also, while you can select all instances in view \ project you cannot double-click to edit the text while they are all selected. Unfortunately you need to deselect and do one at a time.
The only approach I’ve found to get close to the desired result is to apply a suffix override to one dimension line, then use the Modify > Copy tool to move it to another element [orientation needs to be similar though]. It will maintain the suffix with this workflow:
Video Example: http://screencast.com/t/ZTZlZjU0

Ryan Duell