I have eventually found a solution but it was not easy to find (for me). It is based on these two posts (from 2002):
http://www.mail-archive.com/lyx-users@l ... 20792.html
http://www.mail-archive.com/lyx-users@l ... 20869.html
I tried out countless variations that all produced wrong results one way or the other. Part of the confusion came from this post:
http://www.mail-archive.com/lyx-users@l ... 52814.html
Anyway, eventually I ended up with simply this, which seems to work perfectly:
Code: Select all
Code, edit and compile here:
\let\oldquote=\quotation\let\oldendquote=\endquote\renewenvironment{quotation}{\singlespacing\oldquote}{\oldendquote}
In the same dialog, under Text Layout, the line spacing should be set to OneHalf, which then affects the rest of the document.
The TOC and bibliography can be single spaced too, by using the menu Edit > Paragraph Settings while the cursor is just before the auto-generated TOC and bibliography respectively.
Hope that may help someone out there, having the same difficulties as I just had.
Also, if the above solution is not a good one for some reason, please let me know! I don't know LaTeX, it just seems to work.
Rune