How to Enable PDF Passthrough in Affinity Publisher?

[a2468834]

When adding watermarks into a existed PDF file, I would like to keep the content in PDF unchanged.

From version 1.9.0 of Affinity Publisher, I learned it have started to support PDF passthrough, which seems to be the key feature to realize what I need.

I have Affinity Publisher 1.9.2 (Windows) right now.

However, after I open the original PDF file, Affinity Publisher seems to use other fonts in my PC to replace the content have missing fonts.

So, my question is: how to enable PDF passthrough functionality or how to keep the content unchanged after I try to add watermarks?

Many thanks

p.s. the following pictures are the screenshots from my PC

(1) Font Manager in Affinity Publisher

 

(2) What I see after opening by Affinity Publisher

 

(3) The original layout of PDF file

Edited June 22, 2021 by a2468834

[walt.farrell]

Welcome to the Serif Affinity forums, @a2468834.

PassThrough mode is available only when you Place a PDF file into another document. If, instead, you Open the PDF file for editing, it is always interpreted and you must have all the fonts installed on your system.

[lacerto]

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[a2468834]

Wow~

Thanks for your reply!