Define Datum References for Geometric Tolerances
1. Select the geometric tolerance instance, the Geometric Tolerance ribbon appears.
2. Under the
Tolerance & Datum group, define the Primary, Secondary, and Tertiary references as necessary. The lists contain the currently selected datum feature symbols in the current geometric tolerance model. Click
![](../model-based_definition/images/select_datumtag16x16.png)
to select another datum targets and datum feature symbols created in Creo 4 or later.
You can assign a material condition to the reference by selecting a symbol from the Symbols gallery.
You can add translation symbol
![](../model-based_definition/images/translation_symbol.png)
. For information on the use of the translation symbol, refer to ASME Y14.5-2009.