One entry per page. A bookmark, also called an outline entry, is a named link to a page that PDF viewers list in a navigation pane. SheetStamp writes one per page, in page order, with the text sheet number, a spaced hyphen and sheet title: A-101 - FIRST FLOOR PLAN. If a page has no sheet number, its bookmark starts with Page and the page number. The list is flat, one level deep, with no folders by discipline; in a set ordered by discipline, the entries still read in groups.
Text kept as written. The bookmark carries exactly what the review table holds, including accented letters and characters Windows would refuse in a file name, such as a slash in a title. Line breaks and runs of spaces in a cell become single spaces, so a title that wrapped onto two lines in the title block becomes one readable entry.
Where the text comes from. SheetStamp reads the rectangle you draw around the title block on page 1, on every page. It looks for labels such as SHEET NUMBER, DRAWING NO and SHEET TITLE, takes the value beside or below each, and recognizes number formats like A-101, A1.01, S2.01, FP-101 and M-1A. Text that repeats on most pages, such as the project name, is not taken as a title. The revision is read for the table but does not go into the bookmark.
Check before you write. Windows text recognition can misread, so the review table opens with the rows that need a look: a sheet number not found, a value read with low confidence, a duplicate number, or a number written unlike the rest of its discipline, such as P.103 among P-101 and P-102. A misread in the usual position can still pass without a flag, so read the whole list under All pages as well. Export is allowed while rows are still flagged, which means the check is yours to finish.
Where bookmarks show. Bookmarks appear in viewers that show a PDF outline, including browser PDF viewers. Page labels, which SheetStamp writes into the same copy, are a different story: browser viewers ignore them and keep showing plain page numbers, so for anyone reading the set in a browser, the bookmarks are the way to jump to a sheet.
What the copy keeps and replaces. Existing bookmarks in the source are replaced, not merged. Links and layer settings in the source are not carried into the copy, though its title, author, subject and keywords are. The pages themselves are copied as drawn. Your original file is opened read-only and is never changed.