Many AutoCAD users in the United States need to be able to create drawings in feet and inches. By default, AutoCAD is configured to work in decimal units, which is most appropriate for mechanical design applications or for those creating metric drawings. Designers who work in other disciplines need to be able to reset the units to meet their requirements.
In AutoCAD, from the “File” menu, choose “New” to start a new drawing. By default, the drawing will be configured to use decimal units.
From the “Format” menu at the top of the screen, choose “Units.” You will note that there are many unit types to choose from, including fractional, engineering and architectural. Select architectural feet and inches, then choose “OK.”
Move your mouse; you should see that the coordinates displayed on your cursor, or in the lower left corner of the screen, are measured in feet and inches. You should also see that you are working in a very small area that measures just a few inches from corner to corner.
From the “Format” menu, choose “Limits.” Enter 0,0 to identify the lower left corner of your drawing area. Enter 80′,60′ to specify the upper right corner of your drawing area.
From the “Zoom” menu, choose “Zoom All.” It will not look as if anything has changed, but if you move your mouse, you should see that you are now working in an area large enough to draw a small house.