To Edit Placement References
1. In an open assembly, select the component to edit in the Model Tree or graphics window, right-click, and choose 
from the shortcut menu.
from the shortcut menu.2. Double-click a constraint tag, or right-click the active constraint tag and choose Edit References in the graphics window. The floating dashboard opens.
3. To change references, select a new reference on the assembly, the component, or both. The references automatically update.
4. To change the constraint type, select a reference, right-click, and choose Remove from the shortcut menu. Then select a different constraint from the list and select references as required.
5. Click 
or press ESC to close the floating dashboard.
or press ESC to close the floating dashboard.6. Click 
to accept the new placement references.
to accept the new placement references.