Mike Thorne wrote, "If you need to add architectural dimensions to a decimal drawing or vice versa, you can modify the properties of the individual dimension or set up a new dimension style. The Dim Scale Linear and Dim Units settings under the Primary Units section of the properties for the particular dimension can be modified for each individual dimension. A new dimension style can be created with the Scale Factor under the Primary Units tab set to 12 for architectural dimensions in a decimal drawing or .0833 for decimal dimensions in an architectural drawing. The dim scale linear setting can also be set to the viewport scale if you need to place a dimension in paper space for an object in model space."

NOTES FROM CADALYST TIP PATROL:
This is a great tip on how to display multiple dimension and measurement unit types in the same drawing. Styles are key to annotation displays in AutoCAD. Using them and their millions of options can help to make annotating much easier. You could also use this tip if you need to display inches and millimeters, or any other unit of measure.