Ο προβολέας ψηφιακών βιβλίων¶

Το calibre συμπεριλαμβάνει ένα ενσωματωμένο προβολέα ψηφιακών βιβλίων που μπορεί να δείξει όλες τις κύριες μορφές ψηφιακών βιβλίων. Ο προβολέας ψηφιακών βιβλίων είναι εξόχως προσαρμόσιμος και διαθέτει πολλά προχωρημένα χαρακτηριστικά.

Εκκίνηση του προβολέα ψηφιακών βιβλίων
Πλοήγηση σε ένα ψηφιακό βιβλίο
Highlighting text
Read aloud
Εξατομίκευση των ρυθμίσεων όψης και αίσθησης για καλύτερη ανάγνωση
Αναζήτηση σε λεξικό
Αντιγραφή κειμένου και εικόνων
Zooming in on images
Non re-flowable content

Εκκίνηση του προβολέα ψηφιακών βιβλίων ¶

You can view any of the books in your calibre library by selecting the book and pressing the View button. This 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. On macOS, you can pin it to the dock and launch it from there. On Linux you can use its launcher in the desktop menus or run the command ebook-viewer.

Πλοήγηση σε ένα ψηφιακό βιβλίο ¶

You can «turn pages» in a book by either:

Clicking in the left or right margin or the page with the mouse

Pressing the spacebar, page up, page down or arrow keys

On a touchscreen tapping on the text or swiping left and right

You can access the viewer controls by either:

Right clicking on the text

Pressing the Esc or Menu keys

On a touchscreen by tapping the top 1/3rd of the screen

The viewer has two modes, «paged» and «flow». In paged mode the book content is presented as pages, similar to a paper book. In flow mode the text is presented continuously, like in a web browser. You can switch between them using the viewer Preferences under Page layout or by pressing the Ctrl+M key.

Σελιδοδείκτες¶

When you are in the middle of a book and close the E-book viewer, it will remember where you stopped reading and return there the next time you open the book. You can also set bookmarks in the book by using the Bookmarks button in the E-book viewer controls or pressing Ctrl+B. When viewing EPUB format books, these bookmarks are actually saved in the EPUB file itself. You can add bookmarks, then send the file to a friend. When they open the file, they will be able to see your bookmarks. You can turn off this behavior in the Miscellaneous section of the viewer preferences.

Πίνακας Περιεχομένων¶

If the book you are reading defines a Table of Contents, you can access it by pressing the Table of Contents button. 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.

Πλοήγηση με βάση τη θέση¶

E-books, unlike paper books, have no concept of pages. You can refer to precise locations in e-books using the Go to → Location functionality in the viewer controls.

You can use this location information to unambiguously refer to parts of the books when discussing it with friends or referring to it in other works. You can enter these locations under Go to → Location in the viewer controls.

There is a URL you can copy to the clipboard and paste into other programs or documents. Clicking on this URL will open the book in the calibre E-book viewer at the current location.

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 Back and Forward buttons in the top left corner of the viewer controls. These buttons behave just like those in a web browser.

Κατάσταση αναφοράς¶

calibre also has a very handy Reference mode. You can turn it on by clicking the Reference mode button in the viewer controls. Once you do this, every mouse over a paragraph, calibre will display a unique number made up of the section and paragraph numbers.

You can use this number to unambiguously refer to parts of the books when discussing it with friends or referring to it in other works. You can enter these numbers in the Go to function to navigate to a particular reference location.

Highlighting text ¶

When you select text in the viewer, a little popup bar appears next to the selection. You can click the highlight button in that bar to create a highlight. You can add notes and change the color of the highlight. On a touch screen, long tap a word to select it and show the popup bar. Once in highlight mode you can tap the Adjust selection button to change what text is selected, using touch screen friendly selection handles. Drag the handles to the top or bottom margins to scroll while selecting.

You can use the Highlights button in the viewer controls to show a separate panel with a list of all highlights in the book, sorted by chapter.

You can browse all highlights in your entire calibre library by right clicking the View button and choosing Browse annotations.

Finally, if you use the calibre Content server’s in browser viewer, you can have the viewer sync its annotations with the browser viewer by going to Preferences → Miscellaneous in the viewer preferences and entering the username of the Content server viewer to sync with. Use the special value * to sync with anonymous users.

Read aloud ¶

The viewer can read book text aloud. To use it you can simply click the Read aloud button in the viewer controls to start reading book text aloud. The word being currently read is highlighted. Speech is synthesized from the text using your operating system services for text-to-speech. You can change the voice being used by clicking the gear icon in the bar that is displayed while Read aloud is active.

You can also read aloud highlighted passages by adding the Read aloud button to the selection bar in the viewer preferences under Selection behavior.

Σημείωση

Support for text-to-speech in browsers is very incomplete and bug-ridden so how well Read aloud will work in the in-browser viewer is dependent on how well the underlying browser supports text-to-speech. In particular, highlighting of current word does not work, and changing speed or voice will cause reading to start again from the beginning.

Σημείωση

On Linux, Read aloud requires Speech Dispatcher to be installed and working.

Εξατομίκευση των ρυθμίσεων όψης και αίσθησης για καλύτερη ανάγνωση ¶

You can change font sizes on the fly by using Font size in the viewer controls or Ctrl++ or Ctrl+- or holding the Ctrl key and using the mouse wheel.

Colors can be changed in the Colors section of the viewer preferences.

You can change the number of pages displayed on the screen as well as page margins in Page layout in the viewer preferences.

You can display custom headers and footers such as time left to read, current chapter title, book position, etc. via the Headers and footers section of the viewer preferences.

More advanced customization can be achieved by the Styles settings. Here you can specify a background image to display under the text and also a stylesheet you can set that will be applied to every book. Using it you can do things like change paragraph styles, text justification, etc. For examples of custom stylesheets used by calibre’s users, see the forums.

Αναζήτηση σε λεξικό ¶

You can look up the meaning of words in the current book by opening the Lookup/search word panel via the viewer controls. Then simply double click on any word and its definition will be displayed in the Lookup panel.

Αντιγραφή κειμένου και εικόνων ¶

You can select text and images by dragging the content with your mouse and then right clicking and selecting Copy to copy to the clipboard. The copied material can be pasted into another application as plain text and images.

Zooming in on images ¶

You can zoom in to show an image at full size in a separate window by either double clicking or long tapping on it. You can also right click on it and choose View image.

Non re-flowable content ¶

Some books have very wide content that content be broken up at page boundaries. For example tables or <pre> tags. In such cases, you should switch the viewer to flow mode by pressing Ctrl+m to read this content. Alternately, you can also add the following CSS to the Styles section of the viewer preferences to force the viewer to break up lines of text in <pre> tags:

code, pre { white-space: pre-wrap }