How to change arrow font size?

I would like to change the default font size for text on arrows.

Whenever I add text to an arrow its fontsize 11 which is far too small. Where can one set the default font size for arrow text? I do not want to change the fontsize for every single arrow:

Btw: This is not a duplicate of How to change the default font in draw.io?, because this is about the font-size for arrows.