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Theme is, so to say, a group of styles such as fonts applied to the content prepared in editor, and the method for alignment and the before and after margin of an element. Just like you edit each element in editor, you can use the theme to decorate the styles on the basis of elements and character types.

3Rabbitz Book can completely separate the content prepared in editor from the styles set by the theme. As a result, the following results can be obtained.

And, 3Rabbitz Book can classify themes into two types.


Theme used for creating Web Viewer and EPUB1.


Theme used for building a PDF.

In the <Style | Theme> menu, you can perform the tasks related to themes.

The <Theme> menu is only visible to a user with the “Create Style” role.

11.1Creating a Theme

You can create a theme in the following order.

When you install the 3Rabbitz Book, the “Basic Web Theme” and the “Basic PDF Theme” will be automatically created.
  1. In the upper area of the theme list, click on the <Create Theme> link.

  2. After entering the basics, click on the <Save> button in the lower left corner.

    • As the font and the numbering format are different, you need to create a theme for each language.

Once you have created a theme, you can’t change the type.

Figure 11-1Create Theme Screen

11.2Editing a Theme

You can edit a theme in the following order.

  1. In the theme list, click on the theme name you want to change the style for.

  2. In the left menu, select an element type or character type that you want to set the style for.

  3. After changing the style, use the “Preview” function to see the results ahead of time.

  4. Click on the <Save Now> button to save the changes.

If you change the style, the preview will appear in the bottom as follows.

In case of PDF Theme, the preview is provided by a image file so that the fonts not supported by the web browsers can be processed. So, it may take a long time for the preview to change.
Click on the <Save Now> button to save the changes. Even if you use the Preview, when you select another item or move to another screen without saving, the changes you made will not be reflected.

11.3Tips for Style Setting


Setting a font in Web Theme is different with setting a font in PDF Theme.

Selecting a Font in Web Theme

Setting a font in Web Theme means that you are declaring which font on your computer will be used for your Web Viewer.

If the font declared in your Web Theme does not exist on the computer, then the basic fonts for your web browsers will be used. So, it is desirable to set your font by considering many OS as follows.

Arial, Helvetica, LiberationSans, sans-serif

The above is a list of English fonts with similar shapes existing on Windows, Mac OC and Linux.

3Rabbitz Book provides a list of fonts most frequently used.

Beside what is provided by 3Rabbitz Book, you can enter your own font.

Selecting a Font in PDF Theme

Selecting a font in PDF Theme is an activity to select a font that will be embedded in a PDF file itself. So, you must always pay attention to the license pertaining to the font.

PDF file embeds the font itself, so regardless of the OS, you can see the desirable shapes no matter where you are.

So, only the fonts registered in 15. PDF Font can be used for setting in PDF Theme.


Alignment and Hyphenation

In PDF Theme, if you select “Alignment to Both Sides(Justify)” then you will have set Hyphenation option. For more details, please refer to 16. PDF Hyphenation.

Separating Each Element

The most frequently used way to separate elements is shown as follows.

Indenting the first line of an element

By indenting the first line, you can separate an element. You can reduce the number of pages and the costs for paper while printing a document.

Adding margins before and after an element

You can give margins before and after an element to distinguish elements.

In most cases, a PDF version of novel or essay uses the first method mentioned above. In case of technical books, both methods can be used.

To the contrary, as the second method provides improved readability on the web, you are recommended to use the second method on the web.

Margins Before and After an Element

The space between elements is not the sum of margins before and after each element, but it is the greater of two. For instance, assuming you have the following element configurations,

Heading 1 (Margin before an element: 0,   Margin after an element: 3)
Heading 2 (Margin before an element: 1,   Margin after an element: 2)
Normal    (Margin before an element: 0.5, Margin after an element: 0.5)

The space between Heading 1 and 2 is 3, while the space between Heading 2 and Normal is 2.


You need to refer to the following when you set indentation.

Figure 11-2Spacing and Indentation

Border and Background Setting

You can set borders and backgrounds for your heading, code, command, preformatted, blockquote, epigraph, note, tip and caution.


You can set the border in the following order.

  1. Select an element type that you want to set the border for and click on the <Border> menu.

  2. Select your Line Style, Color and Thickness.

  3. Click on the top(), bottom(), left(), and right() buttons to set the line.

    • Click it once more, the line will be deleted.

  4. After checking the Preview, click on the <Save Now> button.

Figure 11-3Border

Give it a sufficient padding so that the border maintains a sufficient distance from the content on the page.


You can set the background color and image.

Transparent PNG images are supported.

Refer to the following steps when you set the background image.

Figure 11-4Background


You can assign numbers to your heading, ordered list, unordered list, figures and tables. For more details, please refer to 12. Numbering.

Regarding the em, px, pt Units

Selection of units can greatly affect your value setting. Please refer to the following issues when selecting a unit.

Web Theme uses px and em units while PDF Theme uses pt and em units.


A value is determined depending on the font size set in the General. For instance, if we assume that the value in the General is 10px, then 1em will have 10px and 1.1em will have 11px and 0.9em will have 9px.

This unit can be used for both Web Theme and PDF Theme. A value can be set in the following ways.


It has a relative size depending on the display device such as your monitor. It can be used for Web Theme only.


It has a fixed size as it is related to actual printing. It can be used for PDF Theme only.

11.4Main Guide for Each Item

The main items used to set the styles for elements and character types are shown as follows.

Table 11-1List of Items that Theme Can be Set for




Set the base style that can affect the entire theme.


Set the style for text element types. There is no need to set the style for a proofreading element displayed only in editor, so it does not appear in the list.


Set the styles for figure elements.


Set the styles for table elements.


Set the styles for object element. You can set Table of Contents, Index and Blank Page in PDF Theme only.

Character type

Set the styles of character types and links. There is no need to set the style for a proofreading character type displayed only in Editor, so it does not appear in the list.

Depending on each item, different styles can be set. Your Heading, Ordered List, Unordered List, Definition List, Figure, Table, Table of Contents, Index and Footnote are composed of many lower ranked items.


You can set the base style that can affect the entire theme.

Font, Heading Font, Code Font

If you use too many fonts or just one font in one document, the overall readability is degraded. The most adequate number of font types used in one document is two or three although it can be affected by a document type or the characteristics of readers.

With a small number of fonts, you can vary the font size, color or style to overcome the boredom of simplicity.

So, to achieve the most adequate combinations of fonts, you need to use different fonts for the titles and the main text. Additionally, you can set the code fonts for code elements and character types that must use a fixed width.

Table 11-2Font, Heading Font, Code Font

Font Type

Scope of Application

Heading Font

It is used for Heading 1~5, Headlines, Figure captions, and Table captions elements. If it is not set, then font set in “Font” will be used.

Code font2

It is used for code, command elements and code character types. If it is not set, then font set in “Font” will be used.


It is used for other types of elements and characters.

Figure 11-5Font

If necessary, you can set different fonts for each item.

Font Size

The font size set in the General becomes the basis for values using ‘em’ units in individual items.

Text Element

Figure Element

Table Element

Object Element

Table of Contents




Blank Page

Horizontal Line

Character Types

Refer to the following when you set character types.

  1. Technically speaking, EPUB is a group of HTML files. So, you do not create an additional EPUB Theme but use Web Theme instead.To Content
  2. A fixed width font should be used.To Content