* With the guide mirror out of the beam (either set the ''Science'' state in the ''Lamp/Mirror Settings'' pane of the SpUpNIC Control GUI -- if it says Guide Mirror ''Acquisition'', click ''Change'' -- or click on the guide mirror in the instrument schematic to allow the beam through the hole in the guide mirror.
* Turn on the slit illumination, either by clicking on the ''Slit illumination'' icon in the schematic, or by clicking ''Change'' in the ''Instrument Setup'' pane.
* On the TCS:
* Start exposures with the acquisition camera and tune the exposure time/LUT sliders/slit illumination to allow good contrast of the scratches on the lower slit jaw.
* Adjust the acquisition camera focus in the bottom right ''Camera Focus'' box until the scratches on the slit jaw appear as sharp as you can get them.