Then u se F8 to set the beam current to the range you want. Slide the stage door closed, press EVAC button. As you turn up the current to the filament, a color bar will form on the emission current meter . Saturate the filament using the static waveform. Click it twice to get computer smoothed image.
Upper panel shows the scanning speed buttons on left.
Lower panel right shows the focus controls. You might need to go to manual. Upper - brightness and contrast knobs. In manual setting you spin the knobs with your finger to adjust the image to your liking. AUTO works OK but generally manual settings gives a better image.