To enable this feature, turn on the “Use milestones” setting in the Gantt view. Like tasks, they can have dependencies and record coloring. Milestones are represented in the Gantt chart as diamonds with vertical lines. Milestones currently only support date fields, and aren't yet compatible with formulas that produce a date (e.g. When choosing to work with either or both types of records, note that they must be records within the same table. A milestone record must have only an end date (with no start date). A milestone represents a single point in time like a checkpoint, deadline, or meeting.A task record must have both a start date and end date. A task represents work done over a date range.In the Gantt view, you can work with two different kinds of records tasks and milestones. Commentors - Can create, delete, and modify their own personal views.Editors - Can create, delete, modify, and print views.Owners/ Creators - Can create, delete, modify, lock/unlock, and print views.To learn about the other Gantt view settings, including how to add the Gantt view, see this article. Learn about the advanced settings that are available for the Gantt view, including milestones, dependencies, and critical paths.