First, search the help docs and this forum. Maybe your question has been answered! The debugging steps can help, too. Still stuck? Delete this line and proceed.
What I’m trying to do
I want to customize menu font size and symbol/icon size of the Obsidian GUI.
With a monitor ( >= WQXGA resoltion ) application user interfaces are much to small.
Things I have tried
I tried to experimentade with Settings → Appearance → Font size.
It seems, that this configurastion does only affect the font size of the documents but not the font size for menus and menu entries.
Other suggestions are to change the scale factor of the display settings from 100% to 150-200%. But this solutions means loosing original resolution possiblieties of the monitor. This is a bad solution.