4. Trace the mark.Tap the [Trace] button to move the head to the position where the mark (0.5mm mark on the glass board) can be recognized.5. Perform the mark recognition test.Perform the recognition test for the mark with the specified camera and move it to the center of the mark. If a recognition error occurs, identify the cause of the problem on the [Mark Adj] window and take appropriate measures, then perform the recognition test again.