The sepia mode is for a more pleasant reading experience and reduces the blue light of the display. If you want to turn on Sepia Mode just follow the steps below:

  1. Choose the PDF document you want.
  2. Tap on the Settings button. iPhone showing PDF document with Settings button highlighted
  3. Tap on the Sepia button. iPhone showing appearance settings with Sepia button
  1. Choose the PDF document you want.
  2. Tap on the Settings button. iPad showing PDF document with Settings button highlighted
  3. Tap on the Sepia button. iPad showing appearance settings with Sepia button