How to custom theme for MD render

How can I customise the rendering theme of the markdown doc? is there a css to customise? a parameter somewhere? an environment variable to select a theme?

Thanks in advance for any hints, I can’t find anything in the doc on this subject.

Hi @rucoven and welcome to the HedgeDoc community!

There is no option to set a theme or style attributes on a global scope. However for single notes you can insert a HTML <style> block with CSS rules for that note.