How to Change a Task to a Milestone in Microsoft Project

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To change a task to a milestone in Microsoft Project using task information dialog, follow these steps: 

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1. Start by viewing your project in Gantt Chart view where all your tasks are displayed.
2. Start by viewing your project in Gantt Chart view where all your tasks are displayed.
3. In the Task Information dialog box, navigate to the 'Advanced' tab.
4. Look for the 'Mark task as milestone' checkbox and select it. 
5. Click 'OK to confirm the change. Your task will now appear as a diamond-shaped milestone in your project timeline.