- Select the entities you want to scale.
- Launch this tool.
- Set the center of the scaling with the mouse or enter a coordinate in the
  command line.
- The scale dialog is displayed where you can enter the scale factor.
  
 If you want to scale with two different factors in X and Y direction, 
  uncheck the button for proportional scaling:
   
 You can then enter two different scaling factors for X and Y.
 If you want to scale the selection by mouse, check the mouse cursor 
  button:
   
- Click "OK".
- If you have previously chosen to scale the selection by mouse,
  you now have to specify a reference point and a target point for
  the scaling operation.