1-7 Drawing Units
AutoCAD 2023’s Drawing Units dialog box allows for either English or metric units to be used as default values; however, AutoCAD can work in any of five different unit systems: scientific, decimal, engineering, architectural, or fractional. The default system is the decimal system, and it is used with either English values (inches) or metric values (millimeters). See Figure 1-17.
Access the Drawing Units dialog box by first opening the Application menu and then selecting Drawing Utilities.
Specifying or Changing the Drawing Units
Select Drawing Utilities in the Application menu.
Select Units (Figure 1-18).
The Drawing Units dialog box appears (Figure 1-19).
In the Length area, select architectural units by clicking the arrow to the right of the Type text box.
A list of the five unit options cascades down.
Note that the Sample Output section, located slightly below the center of the Drawing Units dialog box, shows fractional inches.
Repeat the procedure and set the drawing units back to Decimal.
Specifying or Changing the Precision of the Units System
Unit values can be expressed with decimal places from zero to eight or in inches from 0 to 1/256 inch.
Access the Drawing Units dialog box as explained previously.
In the Length area, click the arrow to the right of the current precision value display box below the word Precision.
A drop-down list of the possible decimal precision values cascades from the box (Figure 1-20).
The value 0.00 appears in the Precision box.
The original drawing screen appears.
Specifying or Changing the Angle Units Value
You can specify angles in one of five different units: Decimal Degrees, Degrees/Minutes/Seconds, Gradians, Radians, or Surveyor units. Decimal Degrees is the default value.
Change the angle units in the Angle area by selecting the desired units in the drop-down menu under Type. The precision of the angle units is changed in the same way as for linear units.