If you want to mark an important event in the schedule of your project, use a milestone.
Go to the selected project, select the Gantt tab.
Add the milestone within the area of the selected project stage, clicking the 
symbol. We marked them in the screen below.
After clicking, a new window will pop-up where you can enter the name of the milestone, e.g. client’s decision. You can determine the milestone setting date or adjust it later. When you complete the window, click .
You can change the date (place of setting of the milestone on the timeline) by moving your cursor to the milestone, holding the left mouse button and dragging it to the left or right.
This way the milestone
has been added.
