To Add Fits to Dimensions (AutoCAD Mechanical Toolset)

In the drawing area, select the dimensions you want to edit. The Power Dimensioning Ribbon Contextual Tab displays.
Click Power Dimensioning tabFit/Tolerance panel Fit. Find
To change the fit representation, click Power Dimensioning tabFit/Tolerance panel Representation drop-down.
Click the icon corresponding to the desired representation.
Click the Power Dimensioning tabFit/Tolerance panel Symbol drop-downFits Dialog box.
Note: For some representations you must select symbols for the hole and shaft separately. In this case the Power Dimensioning tabFit/Tolerance panel does not contain a Symbol drop-down. Instead it will contain 2 separate drop-down lists for the shaft and hole. In this case you must repeat step 6 for both, drop-down lists.
Select the required symbol and click OK.
Press ESC.