Unifying Paragraph and Line Space

I wanted to unify the space between paragraphs and lines, and thus set both before and after of paragraphs text to 0". Everything was fine, until I needed to change the space between lines. Thus, space between paragraphs appeared bigger than line space. However, I can’t set before and after space to less than 0".

What should I do?

Set the line height to a fixed value e.g., 15 pt for 12 pt text (rather than Single) With before and after space set to zero this will make the overall line spacing consistent.

Thanks a lot. Though I tried what you said before, it did not display correctly. However, when exporting as PDF, it shows nicely. I have reported a bug here: https://www.libreoffice.org/bugzilla/show_bug.cgi?id=85426