Merge PDF window

The Merge PDF window shows the pages of a PDF as thumbnails: add pages of other PDFs, drag pages into a new order, remove pages, then save the result.

Available in pre-release 3.7

Open it with right-click → Document → Merge PDF…. At a glance:

Open: right-click → Document → Merge PDF…, or Ctrl + K, Merge PDF.
Add pages of another PDF: Add PDF…, or drop PDF files from Explorer between two thumbnails.
Move pages: drag them. A blue bar shows where they go.
Remove a page: the ✕ in its top-right corner, Delete, Remove, or right-click → Remove.
Restore a removed page: the ↻ in its corner, Delete, Restore, or right-click → Restore.
Select pages: click, Ctrl + click, Shift + click, drag a box around them, Ctrl + A.
Save: Save writes over the document, Save As… creates a new PDF and opens it.

Open the Merge PDF window #

Right-click the document → Document → Merge PDF….
Ctrl + K, then Merge PDF in the Command Palette. The command is CmdMergePDF; bind a shortcut to it as in Customize keyboard shortcuts.

It works for PDF documents. The window shows the document’s pages, with the current page selected.

Add pages from other PDFs #

Click Add PDF… and pick one or more PDF files, then choose where their pages go: At the end, At the beginning or After page N. N starts as the last selected page; typing a number picks After page.
Or drag PDF files from Explorer onto the thumbnails. A blue bar shows where their pages go.

With pages from more than one file, each page has a colored strip on top; the colors and file names are listed at the bottom, after the page count. Hover a page to see its file and page number.

If a PDF has a password, you’re asked for it.

Reorder pages #

Select the pages to move.
Drag them. A blue bar shows where they go.
Release. The pages move together, in their current order, and stay selected.

Near the top or bottom edge the list scrolls while you drag. Esc cancels the drag.

Remove pages #

Removed pages stay in the list, dimmed, so you can change your mind. They are left out when you save.

Hover a page and click the ✕ in its top-right corner.
Select pages and press Delete, click Remove, or right-click → Remove.

To bring a page back, click the ↻ in its corner, or select it and press Delete, click Restore, or right-click → Restore. Delete removes the selected pages, or restores them when they are all removed.

Select pages #

Click a page to select it; Ctrl + click adds or removes one; Shift + click selects a range.
Drag a box from the space between pages; Ctrl + drag adds to the selection.
Arrow keys, Page Up / Page Down, Home / End move the selection; with Shift they extend it.
Ctrl + A selects all pages.

Save the result #

Save writes the pages over the document and reloads it.
Save As… writes them to a new PDF and opens it in a new tab. The document is not changed.

The document’s bookmarks, links, annotations and form fields are kept and follow their pages. Unsaved annotations are included.

Note: annotations and form fields of added PDFs become part of their pages: they show as before but can’t be edited. The added files aren’t changed.

Tips #

Use Save As… first if you’re not sure: the original stays as it is.
Use Merge PDF to delete pages by how they look; Delete pages from PDF takes page numbers.
Tip: to merge many files or script it, use sumatrapdf-tool merge (Merge PDFs).