to dress to the right

Dress \Dress\, v. i.
   1. (Mil.) To arrange one's self in due position in a line of
      soldiers; -- the word of command to form alignment in
      ranks; as, Dress right, dress!
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   2. To clothe or apparel one's self; to put on one's garments;
      to pay particular regard to dress; as, to dress quickly.
      "To dress for a ball." --Latham.
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            To flaunt, to dress, to dance, to thrum. --Tennyson
      .
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   {To dress to the right}, {To dress to the left}, {To dress on
   the center} (Mil.), to form alignment with reference to the
      soldier on the extreme right, or in the center, of the
      rank, who serves as a guide.
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