You can specify the coordinates of every single inflection point of a polygon.
Procedure
Right-click an inflection point of a polygon.
Click Specify point coordinates. The Specify coordinates dialog opens.
Insert the X and Y coordinates of the point in pixels. If you want to position an inflection point top left in the workspace, enter 0 for X and 0 for Y.
Click OK.
The inflection point is placed on the newly defined position.