I can understand the use case for WYSIWYG and I have thought about it many time, but I have not found a good enough solution to integrate it into the app.

At the beginning, I made the choice to use the Markdown format for a pretty selfish reason. This was just a private project for me to learn both C++ and markdown. Now that it kind of got out of hand in that regard (I'm pretty happy about it), I really don't regret Markdown.

Your note are stored directly on your drive in a markdown file, which mean that, if for whatever reason you want to open it outside of the app, you can, without any issue.

Now, for the editor/preview. Both can be disable (not at the same time), so you can just focus on the editor, or just focus on the final result. You can also just print your note as a Pdf, I've wrote some school project paper like this lol.

I hope it makes sens, it's a bit early here, let me know if you want more info :-)