6 months I bought Samsung Book3 laptop. Large font problem started but not persistent. But since last 1 month it's persistent. I'm a web developer and I have external monitor too.
What's the solution for this problem?
Make sure none of the Compatibility Settings are turned on for Opus. Details here: Windows Compatibility Settings / Wrong DPI / Installer misdetects OS
Beyond that, font settings in Opus 12 are configured under Preferences / Display / Colors and Fonts.
(In Opus 13: Preferences / Colors and Fonts / Fonts.)