Hi Mike, Vic is pretty close, but in order to attach a milestone to a task, you first must build out the milestone path. You can build the milestone path via Setup -> Processes -> Milestone Paths . Once you have a path built out, you'll go to a project you want the milestones on, edit the project settings, and assign your milestone path. Once the milestone path has been assigned, you'll need to determine what tasks you want as your milestones. Most of the customers I directly support tend to use parent tasks, or summary tasks, as their milestones. For instance, Design. For Design, you could have Gather input, Rough Draft, Finalize, all as sub-tasks, with Design as being the parent/summary task, which is the milestone. I hope this helps! Thanks, Dustin Martin Tier 2 Assigned Support Engineer Workfront