The Arduino IDE 2 has been out for a while, and I’ve gotten used to it. Surprise, it’s another piece of software based on Electron. If you don’t know what that is, it probably doesn’t matter. Just keep going…
The important thing is, if you’ve looked at the preferences for the IDE, you’ll see… not a lot. There are a few things you can change, but wait, there’s more! It’s just hidden.
On macOS hit Command-Shift-P (on Windows it’s probably Window Key-Shift-P, and Linux same, but whatever you folks call the GUI key there.)
Anyway, after hitting those three keys you should see a scrollable and searchable list of stuff. You can scroll and click on something or type in something to filter it a bit more. If you type “User Set” you’ll see “User Settings” and you can click on it.
And Bingo! You’ve got access to the full list of stuff you can change and adjust. Neat!
You can also search for things, like “font” or whatever. I seriously think the greatest advance in software in the past lustrum has been searchable preferences. Anyway, I hope you find this useful.
Oh, and one more thing… If you don’t like any of the (limited) themes in the Arduino IDE you can add your own. See this Personal Themes thread. You can find themes in the Visual Studio Code Marketplace because VSCode also uses Electron. Two words of warning though, some of the themes in the “marketplace” are commercial, or at least “nagware” and will bug you about paying for them. (Which is fine, just making note of it.) The other thing is, I can only assume installing a VSCode theme in something besides VSCode, or just using the “Visual Studio Code Marketplace” for non-Microsoft software violates some Microsoft terms of service or license or such. Because face it, Microsoft still sucks in many ways.