Controlling dimension tolerances  

You can create dimensions as either tolerance or limits dimensions. When creating a tolerance dimension, you can control the upper and lower tolerance limits as well as the number of decimal places of the dimension text. The image tile on the right side of the Dimension Styles dialog box shows the appearance of tolerance and limits dimensions based on the current dimension style settings.  

The display of zero tolerance values depends on the measurement units.
Metric drawings follow the Metric ISO Dimension Standards and display zero tolerance values without a plus or minus sign (0.0). For Imperial drawings, zero tolerance values display with a plus or minus sign (+0.0 or -0.0). To check the drawing measurement type, use the MEASUREMENT system variable.

To control dimension tolerances

   1   Do one of the following to choose Dimension Styles Manager ():

    On the ribbon, choose Annotate > Dimension Styles Manager (in Dimensions).

    On the menu, choose Dimensions > Dimension Styles Manager or choose Format > Dimension Styles Manager.

    On the Dimensioning or Styles toolbar, click the Dimension Styles Manager tool.

    Type setdim and then press Enter.

   2   Click the Tolerance tab.

   3   Make your selections.

   4   Click OK.