I have combined two PDF files to create a new, single file. However, the bookmarks only appear for the second file, there is no sign of the bookmarks from the first file.
Can I export the bookmarks from the first file, then import them into the new file?
Or, is there some other way to create a complete set of bookmarks in the new, single file?
How did you combine the files? Also, what version of Acrobat are you using?
File > Create > Combine Files into a Single PDF in Acrobat DC.