Maybe this is more of a personal style question or maybe it's a question which could lead to overall document size.



I have a couple of 300+ page documents I'm going to have to edit soon and non of these documents have any styles, multilevel list numbering, TOC, or any type of formatting other than simple left aligned paragraphs with manual type numbering.

I have setup a template which I will apply to get everything squared away, but curios about which is better or most efficient: spacing between lines?

Should I go with line spacing of single or line spacing in exact or at least etc. The document font will be TNR 12 if that makes a difference.

Also, how can I change all paragraph marks between each paragraph into the normal style without applying the normal style paragraph mark one by one between paragraphs. This is another clean-up project I'm working on.

All Word documents use Styles; it's unavoidable. The real issue is whether those Styles have been used properly or someone's just ignored them and overridden them willy-nilly with different formats.
Unless you're copying/pasting content from your current documents into new ones based on the template, the most you'll be able to achieve is to change a few formats by attaching the template and using the 'Automatically update document Styles' setting. None of your page layouts will be updated and overridden Styles will continue to be overridden.

As for line spacing, whatever you choose makes no difference to Word.
You should not have such paragraphs in the first place; they should be deleted (easily done via Find/Replace) and the remaining paragraphs formatted with a suitable before/after spacing (preferably via Style defintions).

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]

Thanks Paul...

Got it...