When creating section templates, the option of associating a particular document template with a Parent Document appears on the 'New Section Template Details' page.

If your intention is to keep certain documents grouped together, this is an option. While each section template may be edited independently, the parent feature ensures they will always move together as a group within a solicitation.

We also now have a feature that allows an Administrator to move a tree of section templates from one parent (section template) to another parent (section template) on the configuration side.