You can simply highlight the screen and copy, then paste into the story window, with a couple of caveats.

MS Word only inserts a single "carriage return" between paragraphs. Big Closet expects to see two "carriage returns" between paragraphs. I usually call them linefeeds, but this is really only a cultural difference, because they act the same way and mean the same thing.

Linefeeds, or carriage returns, make the white space that separates paragraphs on the Big Closet version of the Web.

The blank line between the previous sentence and this one marks a paragraph and helps the eye distinguish one speaker from the next, or one action from the next.

Microsoft Word, and many other editors, create these spaces automatically, but only visually, so if one cuts and pastes from MS Word into the edit box, the visual spaces disappear and all the text runs together.

Your own note above has two carriage returns between the two paragraphs, for example, which is a great start. The difference in terminology, linefeeds versus carriage returns, is a technical one that exists because these spaces are created in two different ways on different machines.

I use Unix/OS-X as a general rule, which uses ASCII line feeds to mark newlines. Microsoft Windows, and some other systems, use two separate characters, carriage return followed by linefeed, to mark exactly the same thing. The difference is invisible to the naked eye.

In MS Word, and most other editors, you can make "paragraphs" visible with an editor setting that makes the text look like this.¶
¶
This helps to ensure that what you see on the editor screen will correspond to what you want the Big Closet edit box to create on the Web.¶
¶
To make this happen, you'll have to select the Word / Preferences menu item, then look down the list of what you can cause to appear and check Paragraph marks. You might also check Tab characters, because they too behave differently on the Web than they do in Microsoft Word.¶
¶
I'll stop marking paragraphs now, because I'm only inserting them by hand and it's tiresome, but your editor will do it automatically.

You'll want to make your story look like that in MS Word, with two ¶ symbols between every paragraph and none at the end of lines inside the paragraph.

If you have carriage returns inside the paragraph, the line will be "ragged" in certain screen settings, which will make your text look unattractive, something like the simulation below.

Pellentesque habitant morbi tristique
senectus et netus et malesuada
fames
ac turpis egestas.
Vestibulum tortor quam, feugiat vitae,
ultricies eget, tempor
sit amet, ante. Donec eu libero sit
amet quam egestas semper. Aenean ultricies
mi vitae est.

On the web, no matter how many tabs or spaces one uses, they collapse into one space, and a space at the beginning of a line is discarded, so don't bother trying to indent things. The best way to indent a block quote, for example, as I did above, let's say if you want to include a written note inside the text of your story, is to highlight it in the story box, then click the "Q" button (fifth from the left) in the little icons above the story box.

I hope this is clear. Please let me know if it isn't.

Cheers,

Puddin'