I have a large document that I’m trying to clean up, and there are a large number of blank lines between numbered paragraphs. This is an example of what it currently looks like:
And I’m trying to make it look like this:
I’ve been doing it manually, but it takes far too long.
Thank you in advance for your help 
Share the file.
First make sure that those blank lines do not come from empty paragraphs. Enable View>Formatting Marks to have clues about the real structure of your document. Erase those empty paragraphs.
Inter-paragraph spacing is a property of paragraph style. Identify which paragraph styles are in effect in those paragraphs: when the cursor is in the paragraph, the leftmost textbox in the toolbar displays the style name. Open this style to modify it. Spacing is defined in Indents & Spacing tab. Change above/belox spacing to your liking.
If this answer helped you, please accept it by clicking the check mark 
to the left and, karma permitting, upvote it. If this resolves your problem, close the question, that will help other people with the same question.
When I first got the file, there was a lot of English text at the start of each paragraph such as, “Parallel Passages” that I didn’t need, so I did a find-replace that deleted these, but unfortunately did not remove the blank space, as I didn’t know how. I then tried to delete them manually, but there are thousands of them 
I just figured it out, the find-replace using ^$ replaces them. Thank you for your reply, though
^$ works! Thanks
Thanks. The paragraph answer showed the spaces and yeah ^$ works but remember to use it with the Regular Expressions checked in “Find & Replace.” Thanks guys!
Many thanks to all, it’s saved me a lot of laborious work doing this by hand, and a big shout out to Gregory, I tried ^$ with no success until I ticked the ‘Regular Expressions’ box then it worked.
