Specifies the scale factor for alternate units. For this variable to take effect, alternate units must be turned on. Use the DIMALT variable to turn on alternate units. The default value for DIMALTF (25.4000) represents the number of millimeters in an inch.
Type: Real
Saved: In the .DWG file
Range: >0
Default: 25.4 (The number of millimeters per inch.)