A display window will appear that is 550X550, and the image will be resized to fit. The window can be resized by grabbing a corner and dragging. The filename of the image will be displayed on the title bar of the image display window. Default is linear scale. The extracted spectrum will be displayed in the same window used for the trace fit residuals.
Spectral extraction is done by direct addition.
All output from this routine is in the form of FITS files. Useful for extracting multiple images taken with the same optical parameters. QUIT - make sure you save your work before quitting.