Margin functions have no impact

[dschweinbenz]

The available functions printer.marginBottom(), printer.marginLeft(), printer.marginRight() have no impact on my printer using Epson TM-T20. I am a little bit confused as setting the margin is specified different:

Can anyone give me a hint what settings are applied when using the build-in functions from this library?

export const MARGINS = {
  BOTTOM: "\x1B\x4F", // Fix bottom size
  LEFT: "\x1B\x6C", // Fix left size
  RIGHT: "\x1B\x51", // Fix right size
};