Visualizador de livros digitais

O Calibre inclui um visualizador de ebook incorporado que pode exibir os principais formatos de ebook. O visualizador de livros eletrónicos é altamente personalizável e possui vários recursos avançados.

Iniciar o visualizador de livros

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.

Realce de texto

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 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 also Shift+click or right click to extend the selection, particularly useful for multi-page selections.

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.

Ler em voz alta

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.

Poderá também ler em voz alta passagens destacadas adicionando o botão Ler em voz alta à barra de seleção nas preferências de visualização em Comportamento de seleção.

Nota

O suporte texto-para-voz em navegadores é muito incompleto e contém muitos erros. A qualidade de funcionamento do Ler em voz alta no visualizador embebido no navegador depende da qualidade da implementação subjacente do texto-para-voz nesse navegador. Especificamente, realçar a palavra atual não funciona, e alterar a velocidade ou a voz implica que a leitura será reiniciada a partir do início.

Nota

No Linux, Ler em voz alta requer que o Speech Dispatcher esteja instalado e a funcionar.

Nota

No Windows, as vozes instaladas podem não estar todas visíveis no subsistema SAPI que é usado no texto-para-voz. Nesta ligação encontra instruções para tornar todas as vozes visíveis.

Searching the text

The viewer has very powerful search capabilities. Press the Ctrl+F key or access the viewer controls and click search. The simplest form of searching is to just search for whatever text you enter in the text box. The different forms of searching are chosen by the search mode box below the search input. Available modes are:

  1. Contains - The simplest default mode. The text entered in the search box is searched for anywhere. All punctuation, accents and spaces are ignored. For example, the search: Pena will match all of the following: penal, pen a, pen.a and Peña. If you select the Case sensitive box then accents, spaces and punctuation are no longer ignored.

  2. Whole words - Searches for whole words. So for example, the search pena will match the word Peña but not the word Penal. As with Contains searches above, accents and punctuation are ignored unless the Case sensitive box is checked.

  3. Nearby words - Searches for whole words that are near each other. So for example, the search calibre cool will match places where the words calibre and cool occur within sixty characters of each other. To change the number of characters add the new number to the end of the list of words. For instance, calibre cool awesome 120 will match places where the three words occur within 120 characters of each other. Note that punctuation and accents are not ignored for these searches.

  4. Regex - Interprets the search text as a regular expression. To learn more about using regular expressions, see the tutorial.

Personalizando a aparência e a sensação de sua experiência de leitura

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.

Pesquisa no dicionário

You can look up the meaning of words in the current book by double clicking or long tapping the word you want to lookup and then clicking the lookup button that looks like a library.

Copiando texto e imagens

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.

Ampliar em imagens

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.

Syncing with a paper edition of the current book

Some e-books, that have corresponding print editions, include metadata that marks the start of each paper page. For such e-books, the viewer allows you to jump to a particular paper edition page via the Go to button in the viewer controls. You can also optionally display the paper page corresponding to the current location in the book’s headers or footers via the viewer settings, by adding Pages from paper edition to either the header or the footer.

Atalhos do teclado

The viewer has extensive keyboard shortcuts, like the rest of calibre. They can be customised in the viewer Preferences. The default shortcuts are listed below:

Keyboard shortcuts for the calibre E-book viewer

Atalho de teclado

Ação

Home, Ctrl+ArrowUp, Ctrl+ArrowLeft

Scroll to the start of the current file in a multi file book

Ctrl+Home

Rolar até o início do livro

Ctrl+End

Rolar até o fim do livro

End, Ctrl+ArrowDown, Ctrl+ArrowRight

Scroll to the end of the current file in a multi file book

ArrowUp

Rolar para trás, suavemente no modo fluxo e por tela inteira no modo paginado

ArrowDown

Rolar para frente, suavemente no modo fluxo e por tela inteira no modo paginado

ArrowLeft

Rolar para a esquerda um pouco no modo fluxo e uma página no modo paginado

ArrowRight

Rolar para a direita um pouco no modo fluxo e uma página no modo paginado

PageUp, Shift+Spacebar

Rolar para trás por tela inteira

PageDown, Spacebar

Rolar para frente por tela inteira

Ctrl+PageUp

Rolar para a seção anterior

Ctrl+PageDown

Rolar para a seção seguinte

Alt+ArrowLeft

Voltar

Alt+ArrowRight

Avançar

Ctrl+T

Toggle Table of Contents

Ctrl+S

Ler em voz alta

Alt+P

Change settings quickly by creating and switching to profiles

Alt+f

Seguir links com o teclado

Ctrl+C

Copiar para a área de transferência

Alt+C

Copiar a localização atual para a área de transferência

Ctrl+Shift+C

Copiar a localização atual como um URL calibre:// para a área de transferência

/, Ctrl+f, Cmd+f

Iniciar busca

F3, Enter

Buscar seguinte

Shift+F3, Shift+Enter

Localizar anterior

Ctrl+Plus, Meta+Plus

Aumentar tamanho da fonte

Ctrl+Minus, Meta+Minus

Diminuir tamanho da fonte

Ctrl+0

Restaurar o tamanho padrão de fonte

Ctrl+]

Aumentar o número de páginas por tela

Ctrl+[

Diminuir o número de páginas por tela

Ctrl+Alt+C

Tornar o número de páginas por tela automático

F11, Ctrl+Shift+F

Alternar em tela cheia

:kbd:Ctrl+M’

Alternar entre Modo Paginado e Modo Fluxo para o layout do texto

Ctrl+W

Ativar a barra de rolagem

Ctrl+X

Ativar o Modo de Referência

Ctrl+B

Mostrar/ocultar marcadores

Ctrl+Alt+B

Novo marcador

Ctrl+N, Ctrl+E

Exibir metadados do livro

Ctrl+Alt+F5, Ctrl+Alt+R

Recarregar livro

Ctrl+Shift+ArrowRight

Alterar a seleção atual em uma palavra para frente

Ctrl+Shift+ArrowLeft

Alterar a seleção atual em uma palavra para trás

Shift+ArrowRight

Alterar a seleção atual em um caractere para frente

Shift+ArrowLeft

Alterar a seleção atual em um caractere para trás

Shift+ArrowDown

Alterar a seleção atual em uma linha para frente

Shift+Home

Extender a seleção atual para o início da linha

Shift+End

Extender a seleção atual para o final da linha

Ctrl+A

Selecionar tudo

Shift+ArrowUp

Alterar a seleção atual em uma linha para trás

Ctrl+Shift+ArrowDown

Alterar a seleção atual em um parágrafo para frente

Ctrl+Shift+ArrowUp

Alterar a seleção atual em um parágrafo para trás

Esc, MenuKey

Mostrar os controles do Visualizador de e-books

Ctrl+Comma, Ctrl+Esc, Meta+Esc, Meta+Comma

Mostrar as preferências do Visualizador de e-books

Ctrl+G, ;, :

Ir para um local ou posição específica do livro

Ctrl+Spacebar

Ativar auto rolagem

Alt+ArrowUp

Auto rolar mais rápido

Alt+ArrowDown

Auto rolar mais devagar

Ctrl+I

Mostrar/ocultar o Inspetor

Ctrl+L

Mostrar/ocultar o painel de pesquisa de palavras

Ctrl+Q (Cmd+Q on macOS)

Encerrar

Ctrl+P

Imprimir livro para PDF

Ctrl+F11

Ativar a barra de ferramentas

Ctrl+H

Ativar o painel de destaques

Ctrl+D

Editar este livro

Non re-flowable content

Some books have very wide content that cannot 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 }

Designing your book to work well with the calibre E-book viewer

The calibre E-book viewer will set the is-calibre-viewer class on the root element. So you can write CSS rules that apply only for it. Additionally, the viewer will set the following classes on the body element:

body.calibre-viewer-dark-colors

Set when using a dark color scheme

body.calibre-viewer-light-colors

Set when using a light color scheme

body.calibre-viewer-paginated

Set when in paged mode

body.calibre-viewer-scrolling

Set when in flow (non-paginated) mode

body.calibre-footnote-container

Set when displaying a popup footnote

Finally, you can use the calibre color scheme colors via CSS variables. The calibre E-book viewer defines the following variables: --calibre-viewer-background-color, --calibre-viewer-foreground-color and optionally --calibre-viewer-link-color in color themes that define a link color.