'DDUNITS Command

Controls coordinate and angle display formats and determines precision

	Format menu: Units
	Command line: ddunits

The Units Control dialog box is displayed.

Specifies the display format for units of measure.

• Scientific. Displays units of measure in scientific format.
• Decimal. Displays units of measure in decimal format.
• Engineering. Displays units of measure in engineering format. When you select Engineering, each drawing unit represents one inch.
• Architectural. Displays units of measure in architectural format. When you select Architectural, each drawing unit represents one inch.
• Fractional. Displays units of measure in fractional format.

Precision

Specifies the number of decimal places or fractional size displayed for linear measurements.

Angles

Specifies the display format for angular measurements.

• Decimal Degrees. Displays angular measurements in decimal degrees. Angular measurements are displayed as decimal numbers.
• Deg/Min/Sec. Displays angular measurements in degrees, minutes, and seconds. Angular measurements are displayed with the letter d appearing after the degree measurement, an apostrophe (') symbol appearing after the minute measurement, and a quotation mark (") appearing after the second measurement. For example, a measurement of 123 degrees, 45 minutes, and 56.7 seconds is entered and displayed as 123d45'56.7".
• Grads. Displays angular measurements in grads. The letter g appears after the measurement.
• Radians. Displays angular measurements in radians. The letter r appears after the measurement.
• Surveyor. Displays angular measurements in surveyor units.

Precision

Specifies the number of decimal places displayed for angular measurements.

Direction

Sets the direction of angles in measurements. Displays the Direction Control dialog box.

Direction Control Dialog Box

The Direction Control settings determine what orientation is defined as angle 0 and in which direction, clockwise or counterclockwise, positive angles are measured when entered.When AutoCAD LT prompts for an angle, you can locate a point in the desired direction or enter an angle.

Angle 0 Direction

Sets the direction of the zero angle. The following options affect the entry of angles, the display format, and the entry of polar, cylindrical, and spherical coordinates.

• East. Specifies the compass direction East.
• North. Specifies the compass direction North
.
• West. Specifies the compass direction West.
• South. Specifies the compass direction South.
• Other. Specifies a direction different from the points of the compass.

Angle

Specifies a value for the zero angle. You can specify the angle by entering a value.

Pick

Defines the angle in the graphics area based on the angle of an imaginary line that connects any two points you specify.

Counter-Clockwise

Sets the positive angle direction to counterclockwise. This option affects the entry of angles and the display format.

Clockwise

Sets the positive angle direction to clockwise. This option affects the entry of angles and the display format.

Note: Clockwise and Counter-Clockwise control the direction of positive and negative angles. The default direction for positive angles is counterclockwise. Selecting Clockwise reverses the positive and negative angles in arcs, rotation, and polar arrays.

Related Commands: UNITS sets coordinate and angle display formats and precision from the command line.
System Variables: ANGBASE stores the angle 0 direction, with respect to the current UCS. ANGDIR stores the setting for clockwise or counterclockwise direction, with respect to the current UCS. AUNITS stores the Angular Units mode. AUPREC stores the number of decimal places for angular units. LUNITS stores the setting for Linear Units mode. LUPREC stores the number of decimal places or the denominator for linear units. UNITMODE stores the setting for fractional, feet and inches, and surveyor's angles as previously set or in input format.