Difference between revisions of "Okular"

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==What is Okular?==
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Its development began as part of Google's Summer of Code program. The [http://developer.kde.org/summerofcode/okular.html description of the project] can be found [http://developer.kde.org/summerofcode/okular.html here].
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Its development began as part of Google's Summer of Code program. The description of the project can be found at [http://developer.kde.org/summerofcode/okular.html KDE Developer's Corner].
  
 
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Okular combines the excellent functionalities of [[KPDF]] with the versatility of supporting different kind of documents, like PDF, Postscript, DjVu, CHM, and others.
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Okular combines the excellent functionalities of [[Special:myLanguage/KPDF|KPDF]] with the versatility of supporting different kinds of documents, like PDF, Postscript, DjVu, CHM, and others.
  
 
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[[Image:Okular-annotations.png|thumb|300px|center|Annotating in Okular]]
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[[Image:Okular-annotations.png|thumb|300px|center|Annotations in Okular, which can be saved within the PDF file]]
  
  
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If you are interested in contributing to '''Okular''', please [http://okular.kde.org/contact.php contact the team]. Programmers and non-coders alike are welcome.
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If you are interested in contributing to '''Okular''', please [http://okular.kde.org/contact.php contact the team]. Programmers and non-coders are welcome all the same.
  
  
 
==Hints and Tips== <!--T:12-->
 
==Hints and Tips== <!--T:12-->
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=== Printing === <!--T:16-->
  
 
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In [http://forum.kde.org/viewtopic.php?f=20&t=85805&p=147758#p147758 this forum topic] a user stated that '''Okular''' could not print PDFs.  The problem was traced to a corrupt ~/.cups/lpoptions.  Renaming this file allows Okular to rebuild it, after which he had no more problem printing PDFs.
 
In [http://forum.kde.org/viewtopic.php?f=20&t=85805&p=147758#p147758 this forum topic] a user stated that '''Okular''' could not print PDFs.  The problem was traced to a corrupt ~/.cups/lpoptions.  Renaming this file allows Okular to rebuild it, after which he had no more problem printing PDFs.
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=== Reviewing Documents / Annotations === <!--T:17-->
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Double clicking on either one of the '''Review''' tools (<keycap>F6</keycap>) allows you to make multiple annotations without having to reactivate the tool after the first time.
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How to keep the annotations you made to the PDF file:
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By default, Okular saves annotations in the local data directory for each user. Since KDE 4.9, it's optionally possible to store them directly in a PDF file by choosing "File -> Save As...", so they can be seen in other PDF viewers.
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Note that this feature requires Poppler 0.20 or newer for regular PDF documents. If the PDF document you are annotating is encrypted, this feature requires Poppler 0.22 or newer.
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Latest revision as of 23:28, 2 March 2018

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What is Okular?

Okular.png
Okular is a universal document viewer for KDE SC 4.x

You can watch for development at the project Home Page.


Background

Its development began as part of Google's Summer of Code program. The description of the project can be found at KDE Developer's Corner.

Okular combines the excellent functionalities of KPDF with the versatility of supporting different kinds of documents, like PDF, Postscript, DjVu, CHM, and others.

The document format handlers page has a chart describing in more detail the supported formats and the features supported in each of them.


Annotations in Okular, which can be saved within the PDF file


As well as supporting many formats, Okular offers such features as text selection, annotation, extraction of files embedded within a document, and many other surprises. Screenshots of Okular in action can be seen here.

You can talk to developers and other users on IRC, irc.freenode.org, channel #okular.

If you are interested in contributing to Okular, please contact the team. Programmers and non-coders are welcome all the same.


Hints and Tips

Printing

In this forum topic a user stated that Okular could not print PDFs. The problem was traced to a corrupt ~/.cups/lpoptions. Renaming this file allows Okular to rebuild it, after which he had no more problem printing PDFs.

Reviewing Documents / Annotations

Double clicking on either one of the Review tools (F6) allows you to make multiple annotations without having to reactivate the tool after the first time.

How to keep the annotations you made to the PDF file:

By default, Okular saves annotations in the local data directory for each user. Since KDE 4.9, it's optionally possible to store them directly in a PDF file by choosing "File -> Save As...", so they can be seen in other PDF viewers. Note that this feature requires Poppler 0.20 or newer for regular PDF documents. If the PDF document you are annotating is encrypted, this feature requires Poppler 0.22 or newer.


This page was last modified on 2 March 2018, at 23:28. Content is available under Creative Commons License SA 4.0 unless otherwise noted.