# Click "CLEAR" then "TARGET" and a range of buttons will appear. Click on the "Dome Flat" button toward the right. This will slew the telescope to point to a panel on the ceiling, painted white. Once the telescope has stopped moving, the dome will switch to manual.
# Above the date and time info, click the yellow "Flat Lamp OFF" button. It will turn red and the lamps on the top end of the telescope should now be on.
# On the TCS, make sure the big, green button on the right-hand side says "FOLD MIRROR IS OUT OF BEAM" (else click it).
# On the SpUpNIC Control GUI, make sure there are no mirrors in the light path (no blue border around the spectrograph schematic) and take some trial FLAT exposures to determine the exposure time required to reach ~40k counts. The lamps are quite red, so blue settings (e.g. G4) will need long exposures. It's fine to crank the slit wide open to let more light in (you do not care about resolution here).
# Take e.g. 15 flats by populating the "# Exposures" box accordingly.