Screen shot of x_stsltgui

• The red lines trace the tops of each slits.
• The blue lines trace the bottoms.
• The left-mouse-button (LMB) adjusts brightness/contrast.
• The right-mouse-button (RMB) centers the image on the cursor.
• The z/Z keys zoom in/out.
• The t/b keys recenter the top/bottom edge of the slit to the cursor position.