Dymo LabelWriter SE450 Guide De Démarrage Rapide page 11

Insert the label spool into the slot in the printer cover with
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the labels extending from underneath the roll. See
Figure 7.
Align the left edge of the label with the left edge of the
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label feed slot and insert the label into the slot.
The printer automatically feeds the label, stopping at the
beginning of the first label.
If the printer does not feed the labels, make sure the
first label is fully inserted and then press the form-feed
button on the front of the printer.
If the first label on the roll is not a full label, press the
form-feed button to eject the partial label.
Carefully lower the top cover.
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Align labels
against left edge
Figure 7
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