Click anywhere in the Timeline view.

Project shifts focus to the Timeline view, and displays the Timeline Tools on the Format tab.

On the Format tab, in the Insert group, click Existing Tasks.

The Add Tasks to Timeline dialog box appears.

This dialog box contains an outline of the summary and subtasks in the project plan.

Check the boxes for the following task names:

These tasks are summary tasks and a milestone task that you will add to the Timeline view.

Click OK.

Project adds the summary tasks and milestone to the Timeline view. If necessary, adjust the horizontal divider bar so you can see more of the Timeline view.

Next you’ll adjust the formatting of the Author travel and appearances summary task on the Timeline.

In the Timeline view, click the bar for the Author travel and appearances summary task.

Only a portion of the summary task name is visible. Hover over the bar name and Project displays a ScreenTip with the task’s full name and other details.

On the Format tab, in the Current Selection group, click Display as Callout.

Project displays this summary task as a callout, which for this task has the advantage of making the full task name visible.

Next you’ll add the final milestone task to the Timeline, but you’ll use a different technique.

In the Task Name column, click the name of task 24, Launch complete!

On the Task tab, in the Properties group, click Add to Timeline.

Project adds this milestone task to the Timeline view.

As you can see on the Timeline, Project displays the milestone tasks as callouts and uses the diamond marker that is a visual convention for milestones.