Forms designed by 1c have 2 parts: caption and header. Is there any reason to have those 2 or is possible to group them together without any lack of logic?

I am wondering because sometimes my clients want to put some information which is part of the header next to caption lines (for ex. to the right) and I have to duplicate filling procedure for 2 different areas.

Alexey, I guess you mean multipage print forms. In that case the form will have a first page caption and a header that will repeat on each page.