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Changing the default PDF zoom level

This is a quick tip on how to change the default PDF zoom level in different applications. I have a 27" 1440p screen so I'm using page fit as the value in these examples. These are tested on Ubuntu 18.04 so YMMV.

Evince

Run the following commands in the terminal:

gsettings set org.gnome.Evince allow-links-change-zoom false
gsettings set org.gnome.Evince.Default sizing-mode fit-page

Firefox

  1. Type about:config to the address bar and press enter
  2. Search for pdfjs.defaultZoomValue
  3. Change the value to page-fit

Other values can be found from the pdf.js wiki.