How to write and publish a scientific paper - Barbara Gastel, Robert A. Day 2022

A supplement on supplementary material online
How to write the results
Preparing the text

Increasingly, journals are electronically posting material that is supplementary to papers being published. Although sometimes this material is about methods, most commonly it provides information about the results. For example, additional data may be posted, or additional tables and figures may be provided online. Whether authors may submit such supplementary material, and if so how, varies among journals. Also, norms regarding what supplementary materials to provide online vary among research fields. If you think that providing supplementary material for online posting would be desirable, consult the instructions to authors given by your target journal. If possible, also see what papers analogous to yours have done in this regard. Keep in mind, too, that the journal editor may ask you to place some of your material in an online supplement.