Specifies display of alternate units in dimension measurements and sets their format and precision.
The following options are displayed.
Adds alternate measurement units to dimension text. Sets the DIMALT system variable to 1.
Displays and sets the current alternate units format for all dimension types except Angular.
Sets the number of decimal places for alternate units. (DIMALTD system variable)
Specifies the multiplier used as the conversion factor between primary and alternate units. For example, to convert inches to millimeters, enter 25.4. The value has no effect on angular dimensions, and it is not applied to the rounding value or the plus or minus tolerance values. (DIMALTF system variable)
Sets rounding rules for alternate units for all dimension types except Angular. If you enter a value of 0.25, all alternate measurements are rounded to the nearest 0.25 unit. If you enter a value of 1.0, all dimension measurements are rounded to the nearest integer. The number of digits displayed after the decimal point depends on the Precision setting. (DIMALTRND system variable)
Includes a prefix in the alternate dimension text. You can enter text or use control codes to display special symbols. For example, entering the control code %%c displays the diameter symbol. (DIMAPOST system variable)
For more information, see Control Codes and Special Characters.

Includes a suffix in the alternate dimension text. You can enter text or use control codes to display special symbols. For example, entering the text cm results in dimension text similar to that shown in the illustration. When you enter a suffix, it overrides any default suffixes. (DIMAPOST system variable)
For more information, see Control Codes and Special Characters.

Controls the suppression of leading and trailing zeros and of feet and inches that have a value of zero. (DIMALTZ system variable)