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Sets the "speed" of zooming, and the default Zoom command
Use the "Zoom" Preferences item from the Setup menu to control how the Zoom command works.
Use this dialog to control your Zoom preferences
If you work with a lot of very large drawings, or if you have a slow computer, then you may wish to make Zoom Window the default zoom command. The Zoom Window command is also useful when using alternate input devices such as touchscreens, or digitizing pads.