How disable code folding in Coder?

I want to disable automatic code folding in the Coder editor (ie set the default to do not fold anything). I’ve looked around the various menu options including the Preferences menu but no joy - ditto by searching this forum.

Is it possible? And if it is, how?

many thanks,
John

Just answering my own question here for posterity

CTRL + HOME

appears to toggle code folding in Coder and in the full python code editor option in Builder