Control viewpoints. It includes 
‘Zoom Fit’ function.
 
 
 
Axonometric View
Change the view to axonometric projection with zoom-fit. 
Shortcut Key '1' 
  
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Front View
Change the viewpoint to front with zoom-fit. (-XZ Plane) 
Shortcut Key '2' 
  
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Rear View
Change the viewpoint to right with zoom-fit. (XZ Plane) 
Shortcut Key '4 
  
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Left View
Change the viewpoint to left with zoom-fit. (-YZ Plane) 
Shortcut Key '3' 
  
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Right View
Change the viewpoint to right with zoom-fit. (YZ Plane) 
Shortcut Key '5' 
  
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Top View
Change the viewpoint to top with zoom-fit. (XY Plane) 
Shortcut Key '6' 
  
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Bottom View
Change the viewpoint to bottom with zoom-fit. (-XY Plane) 
Shortcut Key '7' 
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