I mean in a note, perhaps you have a wall of text but just want to slap an idea on top. Make a post-it which creates a box you can write on and post onto the text. Or if you have an image or PDF you can slap a post-it on top of it, like annotating without affecting the piece. Would also come in handy when working with others on a note.
Please add a post-it function for quick noting. Just a click and note, like post-its in real life. And the option to turn off auto correct, for ***** sake, how else am I supposed to type drunkenly and decipher it later? It can't hurt to allow us to turn it off.