[cybmole]

thanks - don't bother testing the override "feature" as i blieve the posted explanation of cascading stylesheets rules covers it OK

new question. I'm stumpted on how to apply the indent & line spacing prefs in bulk.

i thought a 2 stage solution would work so I've backed up my library & then have converted all epub to epub with remove blank lines + set indent to 1em set in prefs.

I reckoned that would be a good 1st step & it has worked as expected.

for step 2, I was then hopeful that another epub to epub pass, this time with blank lines unchecked and with a short version of your prefs in my extra css
p {margin-top: 0.3em ; margin-bottom: 0.3em}
would do the trick, but it has not had any effect.

so i must be doing something wrong here, if it worked for you -?

maybe my step 1 ( remove line spaces) has stuffed the stylsheets with explicit zeros ? is that how "remove blank lines" works ?.

I think that is what has happened, so now it's like with the text-indent issue. the extra css will not override the stylesheet specifics, even with the !important tag