It should be possible to set a global font, which overrides custom font settings in all objects.
At the moment a changed font size at a diagram for example is preventing this font for being overriden by a global font change.
Thanks for the suggestion - to clarify, starting in version 21 we’ve introduced means to only override e.g. the font size, but leaving all other font properties at “Default” by setting their value to Null().
This means a global change of the default font would change all font properties but the size for this font instance. Does that help in your use case?