Various zooming actions allow controlling the area and presentation scale of the TCD document that is displayed in the Drawing window. They are accessible from the Zoom group of buttons in the Main toolbar.
Click the Zoom window button to define the area to be zoomed and fitted into the current shape of the Drawing window. Define the first corner of a rectangular area to be zoomed with left mouse click, and drag the mouse cursor while holding the left mouse button pressed. Dragged rectangle is drawn in red. Release the left mouse button when the opposite corner is defined as needed.
The Drawing windowdisplays the marked area of the TCD document in the new viewing scale.
In the normal state of Drawing window, you do not have to use the Zoom window button. Simply press the left mouse button and start dragging immediately or wait a while to switch to zooming action. You can observe the cursor shape that changes to the zooming cross and the Zoom window button automatically becomes pressed while defining the zooming window. You can still use short left clicks for normal pointing actions.
The Drawing windowkeeps all views created by various zooming actions on a special list. You can step back through the view list clicking the Previous zoom button.
If you want to inspect the central part of the Drawing window, click the Zoom in button to increase the presentation scale about twice.
If you want to see a greater area of the Drawing drawings, click the Zoom out button that decreases the presentation scale about twice.