Interesting, under the Reply button I have a Rename option to rename the forum thread, and a Delete function. I wonder if that's just me as the post creator?
I don't see a way to do formatting, or attach pictures and such. There is a little eyeball icon at the bottom near the Post Reply button which I think is for previewing the post. However here on the web version on my laptop I can already see a preview above in light grey, as I'm typing, so that's pretty cool (maybe the eyeball is for playforms where you can't see what you type and how it looks at the same time, like phone?)