Click the Primary Units tab and you will see the following:

As an introduction to the Primary units, let us assume that your client wants the dimensions in Decimal and one other subcontractor wants them in Architectural. The solution for that is to show two numbers for each dimension, the first will be the Primary Units and the second will be the Alternate Units. In this tab we will cover the Primary Units.

Under Linear dimensions, you can control the following settings:

• Choose the Unit format, select one of six formats.

• Select the Precision of the unit format selected.

• If you select as the Unit format Architectural or Fractional, then specify the Fraction format, which are: Horizontal, Diagonal, and Not Stacked.

• If you select Decimal, then specify the Decimal Separator, which are: Period, Comma, and Space.

• Specify the Round off number. If you select, for instance, 0.5, then AutoCAD will round off any dimension to the nearest 0.5.

• Input the Prefix and/or the Suffix. To illustrate this part, see below:

  

Under Measurement scale, you can control the following:

• Input the Scale factor. To explain the importance of this setting, let's take the following example: Assume we have a drawing that uses the unit millimeter, hence a length of 10 m, will be 10,000. But in the dimension, we want the value 10 to appear and not...