Okular: Difference between revisions

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    ==What is Okular==
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    [[Image:Okular.png|left|]] Okular is a universal document viewer for KDE 4.
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    ==What is Okular?== <!--T:15--></translate>


    The last stable release is Okular 0.7, shipped in the kdegraphics module of KDE 4.1.
    {|class="tablecenter vertical=centered" width=85%
    |[[Image:Okular.png|left|]]||<translate> <!--T:1-->
    '''Okular is a universal document viewer for KDE SC 4.x'''</translate>
    |}
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    <!--T:3-->
    You can watch for development at the project [http://okular.kde.org/ Home Page].
    You can watch for development at the project [http://okular.kde.org/ Home Page].


    ==Background==
    Its development began as part of Google's Summer of Code program. The [http://developer.kde.org/summerofcode/okular.html description of the project] is located at KDE Developer's Corner.


    Okular combines the excellent functionalities of KPDF with the versatility of supporting different kind of documents, like PDF, Postscript, DjVu, CHM, and others.
    ==Background== <!--T:4-->


    <!--T:5-->
    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].
    <!--T:6-->
    '''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.
    <!--T:7-->
    The [http://okular.kde.org/formats.php document format handlers page] has a chart describing in more detail the supported formats and the features supported in each of them.
    The [http://okular.kde.org/formats.php document format handlers page] has a chart describing in more detail the supported formats and the features supported in each of them.


    [[Image:Okular-annotations.png|thumb|250px|center|Annotating in Okular]]


    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 [http://okular.kde.org/screenshots.php here].
    <!--T:8-->
    [[Image:Okular-annotations.png|thumb|300px|center|Annotations in Okular, which can be saved within the PDF file]]
     
     
    <!--T:9-->
    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 [http://okular.kde.org/screenshots.php here].
     
    <!--T:10-->
    You can talk to developers and other users on IRC, irc.freenode.org, channel [irc://irc.kde.org/#okular #okular].
     
    <!--T:11-->
    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-->
     
    === Printing === <!--T:16-->
     
    <!--T:13-->
    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 <tt>~/.cups/lpoptions</tt>.  Renaming this file allows '''Okular''' to rebuild it, after which he had no more problem printing PDFs.
     
    === Reviewing Documents / Annotations === <!--T:17-->
     
    <!--T:18-->
    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.
     
    <!--T:19-->
    How to keep the annotations you made to the PDF file:
     
    <!--T:20-->
    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 <menuchoice>File -> Save As...</menuchoice>, 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.


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


    If you are intested in contributing to Okular, please contact the [http://okular.kde.org/team.php team].  Programmers and non-coders alike are welcome.  Details of how to contact us can be found [http://okular.kde.org/contact.php here].
    <!--T:14-->
    [[Category:Graphics]]
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    Revision as of 16:35, 21 July 2018

    What is Okular?

    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.