- First, why do we have a very tiny box, located at the very bottom of the screen, to type this post into? Is there a way to give us a big box at the top, or at least at the middle of the screen? I can literally only see one to two lines of what I am typing here, because of this very small box. Ah, I do see we can enter "zen mode" which is much better, however, in Zen mode I no longer have edit icons (bold, italics, etc.) at the top of the screen. I have to get out of Zen mode to see those icons. Is there a fix to all of this?
You should be able to either drag the little draggy icon on the left too expand the composer, or just click it to expand it to the top. It looks like Zen mode is broken for you, but it works fine for me. What browser are you on?
- What happens when we input a URL for people to see? Does it take us out of the site or display a preview? I'll try one here, this is a URL of a recumbent bike.
It depends on the plugins you have configured and how you link the video. You should be able to see a preview on the right when in the composer. I'm on mobile so no preview, but I think if you paste just the video link, it will turn it into an embedded YouTube video.
So my main problem is I can either use a very small box at the bottom of the page, with the edit icons displayed properly, or I can go to Zen mode which makes it bigger, but hides all the display icons. Let's see if I can attach a screenshot of zen mode here:

Yeah that's certainly broken.
Yes, the above is zen mode, you can see it puts the box at the very top of the screen while covering all edit icons. I'm sure I'm doing something wrong. Any suggestions?
I don't think you're doing something wrong, but there's definitely something wrong going on.