I have got a scenario were I need to modify some sales documents with word layouts (docker image 'mcr.microsoft.com/businesscentral/onprem:cu3-na').
When I have copied the original layout and exported the layout and tries to modify it there is no header (logotype, documentname and side number) and no footer in layout.
I couldnt find it in the word layout and I can't see if there are separate layout for headers and footers that are being merged when printing.
To me it seems that the last idea is the one most likely since many word layouts are named body.
Reports are REP1305 and REP1306