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Some journals do not require article submissions to be in any particular format. Would it still be better to try and copy that journals usual format, or use a generic draft format? Would you as an editor or a reviewer prefer one over the other?
For example, many articles use a two column format that is nice and compact for publication, but is a little harder to review and markup - so maybe the reviewers would prefer the article in a single column draft format?
EDIT: I'm specifically asking about journals that state you can use any format you like (for submission), leaving you free to choose whatever will be most convenient for the editors and reviewers. Do you try and still present a "finished product", i.e. format it like it will be if published - or use larger spacing, etc. to make it convenient for review. What would you as a reviewer or editor prefer in the absence of set submission guidelines. Or would you not care in the slightest?