Brother P-Touch 580C User Manual page 86

TO APPLY A SIZE/WIDTH TO THE SELECTED AREA:
(1) Press the AREA key, then use the cursor keys to select the text to which you
want to apply a new character size or width.
(2) Press the SIZE key until the text is displayed in the character size you wish
to use and press the WIDTH key until the text is displayed in the desired width.
(3) Press the RETURN key to apply the chosen size or width to the selected test.
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