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The thickness lever ys used to adjust the gap between the paper path guides and printhead distance from the paper. When using thicker paper, e.g. envelopes or cardstock or 32 gauge sheets, transparencies, etc., the lever is moved to open the gap. On plain paper it is placed in position to tightemn the gap. Also, you should thell the driver in the print properties box what typr paper you are loading.
Note the paper thickness lever in the diagram below:
You can read more about this in the User's Guide. If you don't have a copy of the guide on-hand, go to the following link to get the free on-screen PDF of the guide:
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