Datamax Prodigy Operator's Manual page 31

3. Disengage the printhead by rotating the Head Lift Lever
clockwise to the UP position.
4. Loosen the Label Adjust Guide and slide it outward.
5. Insert the label media as shown.
Figure 3-2 Media Routing
6. Slide the Label Adjust Guide inward until it just touches the
media, tighten the guide in place.
7. Engage the printhead by rotating the Head Lift Lever
counterclockwise to the DOWN position.
8. Press the FEED button a few times to insure proper alignment of
the media.
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Setup and Self Test Page - 23