What did I do in the following OP that the formatting didn't work?

“No need for harsh chemicals
Front-load washing machines eliminate the need to add bleach or other harsh chemicals to get your clothes clean. High-efficiency laundry detergents use a higher concentrated formula so your clothes are rinsed better. Additionally, a front-load washing machine is capable of reaching hotter water temperatures to get your clothes cleaner.”

Because there was a break between the first line and the rest of the text, I simply repeated the _* at the end of the first line and beginning of the rest of the text.
If your preview doesn’t look right, insert the commands again at any break in the text and see if that fixes it.

Got it @ibstubro

As an aside I find once in a while the preview doesn’t match what’s in the box.

Occasionally, @flo and some formatting doesn’t show up in the preview at all, so I seldom use it.

Plus (+) sign before and after underlines, but if it’s not right there’s no way to know until after you post.

If I post and it doesn’t look right, I hit “edit your post” and edit or remove the formatting and put in quote marks instead.

I didn’t know about the + sign for underline, Is there not some other way as well to underline I can’t think of it.
As another aside if you want to edit your OP, the tags don’t show up for editing right?

@flo: The tags should show up for editing for 10 minutes like any other time.

There is no official underline on the list linked under the response box, @flo. It’s word-of-mouth. Perhaps you’re thinking of strikeout.

And I agree with @jca about the tags showing up in editing. It will not autofill @names, and that’s annoying.

Re. the editing, sorry I meant Meta or Social or General not tags.

@ibstubro Maybe I’m thinking of strike, it’s possible.