2013

For information about entering direction and magnitude angles, see Point
Specification.
Pan
Shifts the image without changing the level of magnification.
Zoom
If perspective viewing is off, dynamically increases or decreases the apparent
size of objects in the current viewport.
A slider bar along the top of the drawing area is labeled from 0x to 16x, with
1x representing the current scale. Moving the slider bar to the right increases
the scale. Moving it to the left decreases the scale.
If perspective viewing is on, Zoom adjusts the camera lens length, which
changes the field of view and causes more or less of the drawing to be visible
at a given camera and target distance. The default lens length is 50mm,
simulating what you'd see with a 35mm camera and a 50mm lens. Increasing
the lens length is similar to switching to a telephoto lens. Decreasing the lens
length widens the field of view, as with a wide-angle lens.
A slider bar along the top of the drawing area is labeled from 0x to 16x, with
1x representing the current lens length. Moving the slider bar to the right
increases the lens length. Moving it to the left decreases the lens length.
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