Epson Stylus PHOTO 950 User Manual page 105

Note:
Position the ruler to pass through the center of the circle when
measuring.
If you print the position check pattern on the CD-R instead of the
check sheet, you may not measure the gap correctly. Make sure to
include the internal transparent compartment of the CD-R in the
measurement range. Measure the distance from the circumference
of CD-R tray's center circle to the horizontal line of the check
pattern.
3. Save the measured value to the EPSON Print CD
1. Select Fine-tune Print Position from the File menu. The
Fine-tune Print Position dialog box opens.
A: Height
B: Width
Printing on CD-R
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