Modules for Laying Out Content-submission Forms

Question

In reviewing Drupal layout modules, I'm left with the impression that while many exist for formatting existing content (e.g. Panels, Views and Display Suite), there are very few (if any) that focus on changing the layout of content-submission forms - and therefore there's no alternative but modifying the associated templates themselves. Is this a correct impression? And if so, I'm curious as to why so little focus on content-submission modules. Thank you very much.

Answer 1

Panels will let you change the node/add node/edit forms.