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110 lines
5.2 KiB
ReStructuredText
110 lines
5.2 KiB
ReStructuredText
.. _viewer:
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The E-book viewer
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=============================
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calibre includes a built-in E-book viewer that can view all the major e-book formats.
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The E-book viewer is highly customizable and has many advanced features.
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.. contents::
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:depth: 1
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:local:
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Starting the E-book viewer
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-----------------------------
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You can view any of the books in your calibre library by selecting the book and pressing the :guilabel:`View` button. This
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will open up the book in the E-book viewer. You can also launch the E-book viewer by itself from the Start menu in Windows
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or using the command :command:`ebook-viewer` in Linux and macOS (you have to install the command line tools on macOS
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first by going to :guilabel:`Preferences->Advanced->Miscellaneous`).
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Navigating around an e-book
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-----------------------------
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.. |prev| image:: images/previous.png
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.. |next| image:: images/next.png
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.. |scroll| image:: images/scroll.png
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.. |bookmi| image:: images/bookmark.png
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.. |toci| image:: images/toc.png
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.. |navposi| image:: images/nav_pos.png
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.. |refmi| image:: images/ref_mode_button.png
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You can "turn pages" in a book by using the :guilabel:`Page previous` |prev| and :guilabel:`Page next` |next| buttons, or by pressing
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the :guilabel:`Page down`/:guilabel:`Page up` keys. Unlike most e-book viewers, calibre does not force you to view books in paged mode.
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You can switch to flow mode by clicking on the scroll mode button |scroll| at the top right. You can then scroll by amounts less than a page
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by using the scroll bar or various customizable keyboard shortcuts.
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Bookmarks
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^^^^^^^^^^^^
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When you are in the middle of a book and close the viewer, it will remember where you stopped reading and return there
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the next time you open the book. You can also set bookmarks in the book by using the :guilabel:`Bookmark` button |bookmi|. When viewing EPUB format
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books, these bookmarks are actually saved in the EPUB file itself. You can add bookmarks, then send the file to a friend.
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When they open the file, they will be able to see your bookmarks.
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Table of Contents
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^^^^^^^^^^^^^^^^^^^^
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If the book you are reading defines a Table of Contents, you can access it by pressing the :guilabel:`Table of Contents` button |toci|.
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This will bring up a list of sections in the book. You can click on any of them to jump to that portion of the book.
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Navigating by location
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^^^^^^^^^^^^^^^^^^^^^^^^
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E-books, unlike paper books, have no concept of pages. Instead,
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as you read through the book, you will notice that your position in the book is displayed in the upper left corner in a box
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like this |navposi|. This is both your current position and the total length of the book. These numbers are independent of the screen size and font
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size you are viewing the book at, and they play a similar role to page numbers in paper books.
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You can enter any number you like to go to the corresponding location in the book.
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calibre also has a very handy
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reference mode. You can turn it on by clicking the :guilabel:`Reference mode` button |refmi|. Once you do this, every time you move your
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mouse over a paragraph, calibre will display a unique number made up of the section and paragraph numbers.
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.. image:: images/ref_mode.png
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:align: center
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You can use this number to unambiguously refer to parts of the books when discussing it with friends or referring to it
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in other works. You can enter these numbers in the box marked Go to at the top of the window to go to a particular
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reference location.
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If you click on links inside the e-book to take you to different parts of the book, such as an endnote, you can use the :guilabel:`Back` and :guilabel:`Forward` buttons
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in the top left corner to return to where you were. These buttons behave just like those in a web browser.
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Customizing the look and feel of your reading experience
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------------------------------------------------------------
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.. |fontsizei| image:: images/font_size.png
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.. |fsi| image:: images/full_screen.png
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.. |prefbi| image:: images/pref_button.png
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You can change font sizes on the fly by using the font size buttons |fontsizei|. You can also make the viewer full screen
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by pressing the Full Screen button |fsi|. By clicking the Preferences button |prefbi|, you can change the default fonts used
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by the viewer to ones you like as well as the default font size when the viewer starts up.
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More advanced customization can be achieved by the :guilabel:`User stylesheet` setting. This is a stylesheet you can set that will be applied
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to every book. Using it you can do things like have white text on a black background, change paragraph styles, text justification, etc.
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For examples of custom stylesheets used by calibre's users, see `the forums <https://www.mobileread.com/forums/showthread.php?t=51500>`_.
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Dictionary lookup
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-------------------
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You can look up the meaning of words in the current book by right clicking on a word. calibre uses the publicly available dictionary
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server at ``dict.org`` to look up words. The definition is displayed in a small box at the bottom of the screen.
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Copying text and images
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-------------------------
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You can select text and images by dragging the content with your mouse and then right clicking to copy to the clipboard.
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The copied material can be pasted into another application as plain text and images.
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