Within Teamwork Projects, when you add an event to your calendar, you can choose to add it as a particular event type so that you can filter the calendar to show just events of that type.
Note: To add or edit event types, you will need to be a site administrator.
In the calendar view, click the options button on the right and choose Edit Event Types.
A modal will open listing any existing event types on your site. For each event, you will see the event color, event name, and options to edit and delete.
To edit an event, click the pencil icon to the right of the event name. You will then be able to change the name, and the color associated with the event.
You can also create new event types, by clicking the Add Event Type button at the bottom of the Event Types modal.
Click Finished in the lower right to save your changes.
For more information, see: Creating an event in the calendar