The DimXpert Auto Dimension Scheme tool lets you select existing datums for the reference features.

To use datums in Auto Dimension Schemes:
- Click Auto Dimension Scheme
(DimXpert toolbar) or .
- In the PropertyManager, under Datum Selection, select the primary datum symbol and optionally select the secondary and tertiary datum symbols to use when generating geometric tolerances.
You can select existing datums.
- Set options.
- Click
.