Line number customization

Other than none, you can assign anything listed here to line-numbering.

So maybe you happen to think about the Roman Empire a lot and want to reflect that in your pseudocode?

#set text(font: "Cinzel")

#pseudocode-list(line-numbering: "I:")[
  + explore European tribes
  + *while* not all tribes conquered
    + *for each* tribe *in* unconquered tribes
      + try to conquer tribe
    + *end*
  + *end*
]

Alignment

By default, line numbers are placed with the alignment horizon + right, which can look weird when a single step in the algorithm spans multiple typesetting lines. You can modify the line numbering alignment using the line-number-alignment option:

#pseudocode-list(line-number-alignment: top + right)[
  + Single line
  + Multiple \ lines
]