How to Set the Initial View of a PDF

When someone opens your PDF, the viewer makes a series of decisions on your behalf: what zoom level, which page, whether the bookmarks panel is showing, whether the window is sized to the document. You can make most of those decisions yourself, and they are stored in the file. It is a small feature that noticeably improves how a document lands — a 200-page manual that opens with its bookmarks panel already visible is a different reading experience from one that does not.

What the initial view controls

The settings live in two places in the file: the /OpenAction entry in the document catalogue, which specifies a destination and zoom, and the /ViewerPreferences dictionary, which covers window and UI behaviour.

Between them you can specify:

• Which page opens first, and at what zoom — fit page, fit width, fit visible, or a specific percentage.
• Which navigation panel is open: none, bookmarks, page thumbnails, attachments, or layers.
• Page layout: single page, continuous scrolling, two-up, two-up with a cover page.
• Window behaviour: resize to fit the document, centre on screen, open in full screen.
• Interface chrome: hide the menu bar, toolbars, or window controls.
• Display the document title in the window bar instead of the filename.

The last one is worth doing on every document you publish. By default many viewers show report_FINAL_v7_reviewed.pdf in the title bar; setting the title metadata and ticking this option shows "Annual Report 2026" instead.

Setting it in Acrobat

File → Properties → Initial View, which maps almost one-to-one onto the underlying settings:

• Navigation tab: Page only / Bookmarks Panel and Page / Page Thumbnails Panel and Page / Attachments Panel and Page.
• Page layout: Default, Single Page, Single Page Continuous, Two-Up, Two-Up Continuous, with cover-page variants.
• Magnification: Default, Fit Page, Fit Width, Fit Visible, or a percentage.
• Open to page: a specific page number.
• Window Options: resize window to initial page, centre window, open in full screen, and the show-title-instead-of-filename choice.
• User Interface Options: hide the menu bar, toolbars, window controls.

Save, and every viewer that honours these settings will use them.

Setting it without Acrobat

Ghostscript can inject an /OpenAction via a pdfmark fragment. Create a small PostScript file:

[ /PageMode /UseOutlines
  /Page 1 /View [/Fit]
  /DOCVIEW pdfmark

and pass it alongside your PDF through Ghostscript. Cumbersome, but it is the free route for batch work. See ghostscript introduction.

PyMuPDF is considerably more pleasant:

doc.set_page_mode("UseOutlines")     # open with bookmarks visible
doc.set_page_layout("TwoPageRight")  # spreads with a cover page

LaTeX users get this from hyperref directly:

\hypersetup{bookmarksopen=true, pdfstartview={FitH}, pdfpagemode=UseOutlines}

Word, LibreOffice, InDesign: InDesign exposes initial view settings in its PDF export dialog (Interactive PDF, and to a lesser extent Print). Word and LibreOffice largely do not — LibreOffice's PDF export has an Initial View tab that covers the main options, which is one of the small ways it beats Word for PDF output.

What actually gets honoured

This is the important caveat. The settings are requests, and support varies:

• Acrobat and Reader honour essentially everything, including the interface-hiding options.
• Browser viewers (Chrome, Edge, Firefox, Safari) honour the opening page and often the zoom mode; they largely ignore panel and window preferences, and they will not hide their own UI.
• Mobile viewers ignore nearly all of it, and reasonably so — a phone has different constraints.
• Foxit, PDF-XChange, Preview sit in between, with Preview honouring the least.

Design accordingly: set the initial view to improve the experience where it is honoured, never to depend on it. A document whose navigation only works if the bookmarks panel opens automatically is a badly built document.

Sensible defaults by document type

Rather than fiddling per file, decide once per category.

Long reference documents (manuals, standards, reports over ~30 pages): bookmarks panel open, fit width, single page continuous. The panel is the point — it turns a wall of pages into a navigable structure. Build the outline first: how to add bookmarks to PDF.

Short business documents (letters, invoices, contracts under ten pages): page only, fit page. A bookmarks panel on a three-page letter is clutter, and fit-page means the recipient sees the whole first page including your letterhead.

Forms: page only, fit width, opening on page one. Fit width matters because form fields are usually text-sized and fit-page makes them unreadable on a laptop. See making a PDF fillable.

Presentations exported to PDF: full screen, single page. This is the one case where the full-screen option genuinely earns its keep — it turns the PDF into a passable slide deck without PowerPoint.

Print-ready artwork and books: two-up with cover page, so the reader sees spreads as they will be bound. See preparing a PDF for professional printing.

Scanned archives: thumbnails panel open, fit page. Thumbnails are how people navigate a document with no text structure.

Things to avoid

Some of these options are capable of actively annoying your reader.

Do not hide the menu bar and toolbars. It is technically possible and almost never justified. The reader loses print, search, and zoom controls, and it reads as hostile — the document equivalent of a website disabling right-click.

Do not force full screen on anything that is not a presentation. Opening a contract full screen with no visible controls startles people.

Do not set "resize window to initial page" for documents in unusual sizes. An A0 drawing that resizes the window helpfully will resize it off the screen.

Be careful with "open to page N". It is useful for a document with a long cover section; it is confusing when the reader expects page one and cannot tell whether they have missed something. If you use it, make sure the destination page is self-evidently a starting point.

Do not set a fixed zoom percentage. 150% is right on your monitor and wrong on everyone else's. Use fit width or fit page, which adapt.

Checking what a file currently specifies

To inspect rather than guess:

• pdftk in.pdf dump_data does not cover this, but mutool show in.pdf trailer/Root will list /OpenAction, /PageMode and /ViewerPreferences if present.
• In Acrobat, File → Properties → Initial View shows the current state, including settings inherited from the producing application.
• Opening in two different viewers and comparing tells you quickly which settings are actually surviving.

If you are auditing a batch of published documents, the /PageMode check is the highest-value one: documents with outlines but /UseNone are the common miss, where somebody built a perfectly good bookmark tree and then shipped it hidden.

Summary

Set the initial view deliberately: bookmarks open for long documents, fit width for anything with small text, page-only for short ones, and the document title rather than the filename in the window bar. Set it in Acrobat's Properties dialog, LibreOffice's export options, hyperref, or PyMuPDF. And treat every setting as a hint — browsers and phones will ignore most of them, so the document must still work when they do.