Which Formatting Choice is Best?

I’m getting close to finishing, and I have decided that I want more space between paragraphs.

If I (1) check “Override text and notes formatting” and modify the formatting, that will result in my photograph paragraphs being left justified.

If I (2) don’t check “Override text and notes formatting,” I will need to go through the entire document changing the paragraph formatting.

I’d prefer option 1, but that wouldn’t be good unless I could find a shortcut way of centering all the photograph paragraphs in Sigil. It looks like doing a replace all for

scrivener9"><img

to

scrivener15"><img

might work (scrivener15 is center justified).

I will be compiling mobi, epub and later odt versions.

Any advice on which choice is best?

Thanks,

Al