Dialog Box: Rotate on Cartesian Axes [Rotation Menu - Atoms window only]
This rotates the structure any of the Cartesian reference axes: x coming straight out towards the observer, y in the plane of the screen or paper pointing to the right and z upwards.
Each time you click the Rotate button, a rotation is added to a master rotation matrix; the number of such rotations is listed at the bottom of the dialog box. When you have finished rotating, click the Done button and the master rotation matrix is applied to the structure. If you click Cancel, no rotations are applied.