- Draw border around links
Whether to draw a border around links.
- Change colors
Enables the color changing options.
- Invert Colors
Inverts colors on the view, i.e. black objects will be shown white.
- Change Paper Color
Changes the paper's color, i.e. the document's background.
- Change Dark & Light Colors
Changes the dark and light color to your preference, that means black will not be rendered as black but as the selected dark color and white will not be rendered as white but as the selected light color.
- Convert to Black & White
Converts the document to black and white. You can set the threshold and the contrast. Setting the threshold to a higher value by moving it to the right will result in lighter grays used.
Allows you to choose the text-to-speech (TTS) engine to be used by Okular. The default is speechd TTS, but you can use all languages and voices depending on the available synthesizers on your platform. On Linux®, speech-dispatcher is used by default to determine available voices.