Zooming In/Out Drawing in Real Time

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Dragging the mouse enables zooming in/out the drawing in real time.

1. Click [Real-Time Zoom] on [View] menu.
   The cursor will be changed to the real time zoom cursor.
2. Drag the mouse.
   Dragging it rightward or upward zooms in the drawing, while doing it leftward or downward zooms out the drawing.
   
3. Click [Real-Time Zoom] on [View] menu.
   The real time zooming will be finished.