Set Default layout mode to Column

Hi folks,
how can i set Default layout mode to “Column” please? Currently it is “Packed”

I did look through config files and did not find where to change it.

Thank you.

used this page as a base, for anyone interested

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layout_node = rv.commands.nodesOfType(‘RVLayoutGroup’)[0]
_property = "{}.layout.mode.format(layout_node)
rv.commands.setStringProperty(_property, [‘column’])