Use the Insert Points 
pointer 
to insert a point in the currently selected object.
Select Insert Points
-
In the Draw Tab
of the Design Panel 
, click Insert Point 
, then click to insert points. -
Choose Edit > Points > Insert Points, then click to insert points.
-
Use Command–click to add a point at the selected position.
Add a Point to a Line
-
Open the Draw tab
of the Design Panel 
. -
Click Edit Points
to enable points editing. -
Click the line that you want to edit. The points are displayed.
-
Click the Insert Points
. The pointer changes to the Insert Points pointer 
.
-
Click the place on the line where you want to add a point.
Click the line to display the points
Click to add a point
The line is reshaped accordingly. The Insert Points tool is active until another feature is selected, or you right-click to deselect.