Any anchor planes that you have created can be removed from the model.
At the beginning of a Warp analysis, the analysed part is automatically constrained to a plane where part deflection is measured from. This plane is defined as the original anchor plane.
You can define your own anchor planes using Warpage Visualization Tools. To access all existing anchor planes go to
(), then in the Warpage Visualization Tools dialog, click Manage Anchor Planes.
(). 

) by pressing and holding down the Shift key while dragging your mouse cursor either towards you or away from you.