Sorry for double posting, but it's the only reliable way to communicate.

Apply a CSS extension to the site, and add the following rules:

form[name='newpost'] > span { display: block; }

form[name='editguideform'] > span { display: block; }

This will make the posts and the guides look like you are editing them, and will let you see the full text (but in mark-down format, without any rendering). Me and @SioN wrote this solution in the other thread, but I wanted to summarize it.

And no, you cannot edit posts of other people.

you can have it in one "line" too

form[name='newpost'] > span, form[name='editguideform'] > span { display: block; }