Часто задаваемые вопросы
When using Ubuntu, I cannot read EPub documents, even if I have okular-extra-backends installed. Why?
Ubuntu (thus Kubuntu as well) packages of Okular are compiled without support for these two formats. The reason is explained in this Launchpad report.
Why are the speak options in the Tools menu grayed out?
Because you don't have a speech service on your system. Install the Qt Speech library and they should be enabled
Некоторые символы не отображаются, а если включить отладочную информацию, появляются сообщения вида «Missing language pack for xxx»
Установите пакет poppler-data.