Assembly Design > Top Down Design > Notebooks > Preparing Notebooks > To Create a Reference Datum Plane for a Notebook
  
To Create a Reference Datum Plane for a Notebook
1. Click Annotate. The Annotate tab opens.
2. Click the arrow next to Draft Datum.
3. Click Draft Datum Plane. The Select Point dialog box opens.
4. Choose one of the following options as a datum plane start point:
◦ —Click in the notebook window to select the start point. Drag the mouse to draw the datum plane. Click a second time to select the end point.
◦ —Enter the X and Y values for the start point's absolute coordinates, then select one of the following options to create the end point:
▪ —Select a point in the graphics window.
▪ —Select a vertex in the graphics window.
▪ —Select a point on an entity.
◦ —Create a datum plane with a start point offset from the end point of the previously created datum plane. Enter the X and Y offset values. Choose one of the first three options above and select the end point.
◦ —Click a point on an entity to select the start point, and then select a point on an entity or a vertex as an end point.
◦ —Click a vertex to select the start point, and then select a vertex or a point on an entity as an end point.
5. At the prompt, enter a name for the datum plane. Press ENTER or click .