Step 3: Wait for file to upload and then right click. In addition, you can also edit a PDF text by converting it back to Word. Step 2: Click on New > File Upload and then click on the PDF file that you wish to edit. There are both downloadable desktop programs as well as online tools that allow you to edit PDFs in the browser. If the file isn’t password protected, the document can still be edited provided you have an appropriate tool available.

But what if you don’t have the original file? If you want to change a document after it’s been converted to a PDF, you usually need the original file and then have to export a new PDF after making your edits.

The other way around isn’t quite so easy, however. Prevailing office software programs such as Word and Excel have been able to create PDF files directly in the application for a long time. But what if that’s what’s needed? What are the options to edit a PDF file? Many also use the format to prevent a document from being subsequently edited. This avoids common conversion problems when exchanging files created in different programs or program versions.

Now you're almost ready: press PDF -> Open in Preview to see the end result and save it.Adobe’s “Portable Document Format,” PDF for short, is a cross-platform file format that reproduces a document exactly, regardless of which application program it was originally created on.

Now, in the Preview section (you might have to press Show Details if you don't see this part) select Scale to Fit: -> Fill Entire Page.

Press OK, and make sure the newly create size is selected under Paper size.

Add a custom page size by clicking on the + in the lower left.

Go to Paper size -> Manage Custom Sizes.

Word tells you that its going to make a copy of.

Open the PDF document you want to add the margin to in Preview.app Find the PDF and open it (you might have to select Browse and find the PDF in a folder).

I also assume that your document originally has A4 pages of 210 x 297 mm. I assume you want to add a margin of 100 mm on the right of each page, but feel free to choose any value that you want. Here’s the full list of file types supported.

Ok, after trying out different page configurations I think I figured out the trick. If Office Online Server is installed, document preview can be shown in modern document libraries for these file types: Acrobat (PDF), PowerPoint (POTM, POTX, PPSM, PPSX, PPT, PPTM, PPTX), Rich Text (RTF), Word (DOC, DOCM, DOCX, DOTM, DOTX).

How to make a preview document editable