As a PDF editor

There are many reasons why you will want to use PDF++ instead of external PDF editing applications such as Adobe Acrobat or PDF Expert.

Auto-update links after adding/removing/extracting PDF pages

Suppose you have a 300-page PDF of a book. It is often a good idea to divide such a large PDF into smaller parts (e.g. chapters) for better loading speed or sync performance.

However, if you use external apps like Acrobat for such a page reorganization, some of the existing links to a page in the PDF will no longer point to the original page and become useless.

Here's where PDF++ comes in: by using PDF++ commands such as "Divide this PDF into two files at this page", you can re-organize PDF pages and auto-update links at the same time so that your links can keep functioning. Obviously, this is not what external apps can do, regardless of how expensive they are. (PDF++ is free and open-source!)

It also takes care of updating page labels in the resulting PDFs properly, which is again, not always possible with other apps.

Add, rename, move, and delete PDF outline items (a.k.a. table of contents / bookmarks)

• Use the "Add to outline" command or the right-click menu to add an outline item to PDF
• Use the right-click menu or drag-drop to move an outline item under another
• Use the right-click menu to rename and delete an outline item or extract the pages in a section as a separate PDF file
• Use the right-click menu or drag-drop to insert a link to the section as an Obsidian link
• Also check out the commands "Copy PDF outlines as markdown list/headings"

Add/edit page labels

Each page in a PDF document can be assigned a page label, which can be different from the page number/index. For example, a book might have a preface numbered "i", "ii", "iii", ... and the main content numbered "1", "2", "3", ...

PDF++ allows you to add custom page labels to PDFs without page labels or modify existing page labels.

(Using page labels in your link display texts will make your notes more robust to page insertion/deletion/extraction: see here for more details.)

Remarks & links

Please note that you need to enable PDF modification in the plugin settings to activate these features.

Also please make sure you have a backup of your data before trying them because they still should be regarded as experimental.