Using the Toolbox > The Adjustments Pane > Expanding the Adjustments Pane Tools > Overview of the Adjustments Pane Features > Using Pan and Zoom
To reset the slice planes to orthogonal angles, follow these steps:
In the Adjustments pane in the tool box, click to activate the Mouse settings.
Click next to Slide.
The tilted 2D MPR planes are reset to orthogonal angles.