if your AO3 fics do the WALL OF TEXT thing (like where there are paragraph indents but no space between them paragraphs) because you copypaste from somewhere else and the formattings don’t mesh, there’s an easy way to fix it!
-in the window where you paste your text, go from “rich text” to “html”,
-copypaste the html’d version of the story that AO3 gave you,
-paste it into a word processor,
-use replace-all to change “<br />” into “</p><p>”.
-make sure the very last line also has a </p> to conclude things (the <p> tag is a paired tag, like a parenthesis, it doesn’t work alone.)
-put the result back into the html window! (it’ll look like a mess in the html processor but it’ll sort itself out for the rich text version.)
tadahh five minutes later and you have increased your potential readership by some number i have no clue about but which is probably pretty noticeable considering how many people tell me they can’t read walls of text either every time I complain about it to them.
<br /> is the one that goes only at the end of a line and makes the next line single-spaced underneath, <p>-</p> are the ones that wrap around a paragraph like parentheses to make it double spaced. So basically what you’re doing with the replace all is inserting “close paragraph-start paragraph”.
Sometimes there might be too much space in a story, because you used to have two br / tags one after the other and it LOOKED like double-space but wasn’t it, so then when you replace them into proper paragraph tags it’ll make a huge gap. Just give your story a quick scroll-down look to find them, it’ll take thirty seconds to delete.
If you absolutely want a list or some other single-spaced chunk in there (like a chatlog) you’ll have to insert that manually. the whole chat should be wrapped up in <p></p>, like this:
<p>first line<br />
second line<br />
<p>new paragraph here!! no line breaks for this one.</p>
but unless your fic is nothing but lists/chatlog it’s easier than the other way around.
and uh that’s all I can think of to explain. I don’t know much more than that myself. I hope it’ll help at least one person out there, but even if y’all already know that stuff I figured it’d be more constructive than just whining about the wall of text issues preventing me from getting my dose of nice-sounding fics. XD;;