No, for the initial submission you can send us your article in any format that is easy to read and to review! That means page numbers, section titles and numbered figures and tables. So if you already prepared your article for another journal or conference, that should do fine.
Once your article has run through our review process and has been accepted, we will ask you to resubmit your work using one of our templates on our template page. These templates have been optimized to help us publish your work for printing and online viewing.