Milestones Events are the types of events that can be added to Milestones Panel. There is a set of those event types defined in the system (deadline, delivery, release etc.). However, AT admin can create custom ones.
Create New Milestones Event Type
In order to create a new custom event type that can be added on person's timeline follow the steps:
From Configuration → Events → Milestones Event Types press Create New Milestone Event Type button:
In the opened Create Custom Event Type window enter a Name for a new event
Choose Event type (default value = Event)
Choose icon for a new event:
Go to Dashboard and create a new custom event on Milestones Panel. → New custom event type will be available in the events list.
Edit Existing Event Type
In order to edit an existing custom event type, follow the steps:
Find event type you would like to edit in Custom Event Type List and click Edit.
In the opened Edit Custom Event Type dialog change a Nameof an event and select an Icon: