To Enter Scale Mode
1. Within Digitizing mode, press C to switch to Scale mode.
2. Specify the height and width of the drawing being digitized.
3. If you are scaling the drawing, type the scaled values.
◦ Press the 0–9 buttons to specify values for height and width. Press D to specify a decimal point.
◦ Press A to switch to the next option.
4. Specify the units for the drawing, and press 0 to switch between them. You can use the following values:
◦ Inches
◦ Millimeters (mm)
◦ Abstract (scales the digitized data into the units of the current drawing)
5. Press C to exit the dialog box. You cannot exit unless all entries are valid.
6. Press F to quit Scale mode.