If the arc and circles in your drawing do not appear as smooth lines, do the following to fix up their appearance.
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How To Smooth Arc And Circle Appearance In AutoCAD
Total Time: 1 minute
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Right click in the model space and selection options
You could also type in the command “options” into the command line.
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Set the arc and circle smoothness
Change the arc and circle smoothness display resolution to 20000. This is the maximum number that AutoCAD will allow you to enter in.
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Arcs and circles will now appear as smooth
The arc and circles in your drawing will now appear smooth.