This menu offers commands for simple geometrical operations: rotation and reflection.
Rotates the image by 90=B0 in the clockwise direction.
Rotates the image by 90=B0 in the counter-clockwise direction.
Flips the image along the vertical. Mathematically, this does a reflection along the image's horizontal center line.
Flips the image along the horizontal. Mathematically, this does a reflection along the image's vertical center line.