Creo Direct > Designing in the Creo Direct Environment > Working in Part Mode > Working with 2D Geometry > Creating 2D Geometry > Sketched Datums > To Create a Sketched Datum
  
To Create a Sketched Datum
1. Create or open a sketch with one or more points, regular lines, or construction lines. The entities appear on the Model Tree.
2. Right-click one or more points or lines on the Model Tree and click Convert to Datum. The selected entities are converted to sketched datum entities.
 
* If you select entities other than points and lines for conversion, the Convert to Datum command is unavailable on the Model Tree shortcut menu.