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How do I Combine/merge Documents or Pages?


How do I combine multiple documents into a single PDF using PDF-XChange Editor or PDF-Tools?

How do I combine two pages of the same size (such as A4) into a single page of a larger size (such as A3)


Note that Combining pages requires that the pages in question are contained within the same document.

Also note that both of these actions can be performed in PDF-Tools by using the respective tools, which have all the same dialog options as in the Editor.

Combining documents

To use the Editor to Combine PDF click:

File > New Document > Combine files into a single PDF

Click add file or Add Folder and browse for the document or folder you want to merge into a single PDF. 

You may order the files to be combined by Title, Location, Type, Size, Modified [date] and Page Range in ascending or descending order by clicking on the column heading. The document creation order can be modified manually by using these buttons to move the selected document up or down in the list:

Page Ranges: Click on the Page Ranges button in order to define the pages of the selected files to be included in the new combined document. All pages of each document are included by default.

Options: Click the Options button for additional settings as follows.


  • Copy will retain all existing comments without modification.
  • Flatten visually retains the comments as base content. Some comments such as sticky notes are not fully compatible with flattening as their content does not pertain to any page coordinate. In such cases only the icon remains.
  • Do not copy simply ignores all comments and merges the files themselves.

Form Fields

  • Copy allows form fields and their data to be copied into the new PDF. The fields can be modified at will.
  • Flatten removes the dynamic element of the form, causing the date to become part of the document instead of the form field.
  • Do not copy ignores all form data, but retains the form fields themselves.
  • Copy With Rename will rename any fields with duplicate names between the documents, ensuring that the each form stays separate and is not unintentionally related.


  • Do not Copy ignores all bookmarks.
  • Copy All will copy all bookmarks from each document that is being merged. Some bookmarks may become invalid depending on page range options selected.
  • Copy related will copy only bookmarks that are related to the pages resulting from the merge.

Repeat as necessary, you can use (Shift+Click) and (CTRL+Click) to select multiple files/folders. Then click OK.

Combining pages

To combine pages in the Editor, Click:

Organize > Merge pages

Then setup your dialog to use the desired page size, orientation, pages to merge, an number of pages per sheet (you can use the preview to ensure that the page will appear as desired):

Finally, Click OK, and you will find that the pages are merged as you desired. 

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