Move the mouse to tilt. Use A and Z to zoom. Press the left and right arrows to adjust the contrast. Press the up and down to shift highlighted layer. Press S to hide or show the skull. (NEW!) Press space to reverse the layers. Press J and L to rotate the head. Press I and K to adjust the offset between layers. Press B to change the backdrop. Press R to reset everything.
Image source: Department of Radiology, Uppsala University Hospital. Uploaded by Mikael Häggström. https://en.wikipedia.org/wiki/Wikipedia:Featured_picture_candidates/CT_of_brain_of_Mikael_H%C3%A4ggstr%C3%B6m.png
