This is a plug-in which replaces the exisitng "Description and Tip..." right click option for SubVIs on the block diagram. This replacement allows the user to change the VI Description for the SubVI that shows up in the context help, and is located in the "Documentation" section of the "VI Properties" menu.
This plug-in directly replaces the existing function. Right clicking the subVI and selecting "Description..." will popup a window that includes the existing description (if one exists), and allows you to edit, then click done to accept changes, or cancel to reject the changes.
Additionally, this plug-in adds the ability to batch edit the description of VIs (useful for polymorphic creation/editing). Just select multiple SubVIs, right-click and select "Description..." In this case, the Description field is not populated, and this will overwrite any existing description in the selected VIs.
Attachement is saved in LabVIEW 2015. For install instructions, go here.