I have a very long document that I have been working on for a couple of years and by mistake I discovered a way to help me find my way round this document when I wanted to edit it.
I clicked onto the “Change Styles” heading in the list of options that run along the top of the page the name of which slips my memory and found a large number.


I then placed my curser against the heading I wanted to find later, clicked onto “Style 5” and it finished up in a column on the left of the page headed “Navigation”
I then cut and posted a number of pages made up of pieces I had written over the years onto a new page but when I opened the “Change Styles” heading the number of options offered was much shorter and “Style 5” was not among them.
I tried a number of ways to make the system I had on the first long document work on the second one but when I saved it, closed the document down and then opened it again the headings were not there.
Can anyone offer a way to make this work?

I believe you are referring to the Document Map (Word 97-2007) or the Navigation pane (Word 2010 and later).

To display the Document Map: Click View | Document Map.

To display the Navigation pane: Click View tab | Navigation Pane.

To see all headings, you may have to right-click and choose that option (as some heading levels may be hidden by default).

__________________
Stefan Blom
Microsoft Word MVP

Microsoft 365 apps for business
Windows 11 Professional

Many thanks for your help.