The Timeline on the Project Dashboard informs you of upcoming or future important dates and milestones for your project.
From your project's Dashboard page, locate the Timeline section (beneath Project Details).
Select a blue dot along the timeline to view the Milestone or Important Date. Use the arrows at each end of the timeline to view additional items.
How to add a Milestone Date to the Timeline
Select the Create button.
From the side blade enter the name of the milestone in the Name field and select a date using the calendar icon in the Date field.
Select the Add Key Date button. Your milestone will now display on the timeline as a blue dot with the corresponding date.
How to Delete a Milestone from the Timeline
Use the Calendar (located below the Timeline section) to remove Timeline dates.
Locate and select the Timeline date on the calendar.
Select the Remove button from the side blade.