Managing and working with milestones is very similar to managing and working with items. The links below point you to articles that give you a good idea of what you need to do by showing you how its done for items.
You can also learn more about milestones and how they work in Create roadmap items.
To view and work with milestones in the Milestones Table
To post comments and mentions to a milestone
See how it's done for items in Post item comments and mentions.
To attach files to a milestone and view and download attachments
See how it's done for items in Add, view and download item attachments.
To move milestones to a new or existing roadmap
See how it's done for items in Move items to another roadmap.
To delete milestones in the Milestones Table, a Swimlane or the milestone card
See how it's done for items in Delete items.