Draw: change preset margins?

In LibreOffice Draw there are margin presets:

  • No margin
  • Narrow
  • Moderate
  • Normal (1.90 cm)
  • Normal (2.54 cm)
  • Normal (3.18 cm)
  • Wide

Is there any way to change these? I’m guessing they’re based on inches which makes them useless for metric paper sizes. It would be useful to save layouts though — is it possible?

Checking Page Properties shows Narrow = 0.64 cm, Moderate = L/R 0.96 cm, T/B 1.27 cm and Wide = L/R 2.54 cm, T/B 1.27 cm.

Also slightly confused that in Irish, the properties panel at right shows a top section labelled Page and one underneath it labelled Leathanach, which means “page”, but I see now that in English the lower part is Slide.

I’m not using Draw much. But it is a general concept of LibreOffice to have templates. Start a new project, adapt the settings you need then save this as default template.
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Advantage: While you can only have one default, you may have a lot of individual templates for projects. And you don’t need to change settings much, if you need more than one template.