Suggestion: Change tooltip of OOC in editor.

At this moment pop-up tooltip of OOC button is just reads "OOC". It's not very helpful.
My suggestion: change change tooltip text to explanation - "Out Of Character text"

It confused me about meaning of this button.

That's a good call. We get lost in our own lingo sometimes.

Thanks for the thought. I'll put that in as soon as I can.