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The SawTooth Function

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NGC 2261 - Hubble's Variable Nebula
Image of Hubble's Variable Nebula (NGC2261) taken 10 Mar 1997
The SawTooth Function works similarly to the SawTooth Hot Key except it works on the underlying data in the data buffer so that you can save the effect in a .FITS file. The result of the operation on the image in the A buffer is left in the B buffer, with the A buffer data unchanged.

Compare this image of Hubble's Variable Nebula (NGC2261) taken 10 March 1997 with the one taken 11 February 1997 shown in the SawTooth Hot Key description.