Hello!

Please bear with me, im not proficient with word but I hope I can explain it so that you understand what my problem is. We have a local htm page at work that was made with word. The original creator is not with us so Im left blind. The page is just a simple header, a left menu and a content page. The page has a ”master” document (index.htm) and from there the rest of the pages are in subfolders.

When I open a ”master” htm document I can see two separate pages in one. See image: https://ibb.co/gtn3fSd
The left one is one htm document, and the right one another.

My question is: how can I achieve a similar setup? That is, how can I set up two pages that I can link to htm documents?

Also, how can I set it up so that I have the header stay put when I click around on subpages?

Thank you for your time!
Chris