Objects creation and modification	Using Precision Tools
Temporary track points
Overview     Operations     Commands

How to create a temporary track point

Select Tools  Temporary track point and specify the new Temporary track point.

You can add as many Temporary track points as you like.
Smart Polar Snap will works on all of them.
Polar and Ortho Snap only on the last created  Temporary track point.

 Toolbar Snap: 

  Menu : Tools  Temporary track point

  Contextual menu : Temporary track point

 Command: TT