SharePoint Designer has an action called Add a Comment. I don't see a similar action in Nintex Workflow. Is there another technique for adding comments to the design surface without adding an action like Log to workflow history?
Based on the description of the "Add a comment" action :
Workflow actions in SharePoint Designer 2010: A quick reference guide - SharePoint Designer
Why not using the ability to add a label directly on action(s) ?
Retrieving data ...