Amazon Kindle Kindle Uživatelská příručka stáhnout pdf (Strana 42)

Publishing on Kindle: Guidelines for Publishers

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specified in the itemref elements (child

of <spine> element in the OPF file).

Valid values are page-spread-left,

page-spread-right, facing-page-

left, facing-page-right, and

layout-blank. The value layout-

blank can be used independently or in

conjunction with other valid values. Default

value is layout-blank.

Required for all graphic-novels; optional for

other fixed-layout books. Removes reader

functionality (e.g., share) which may not be

relevant for certain books such as

children’s. Valid values are children or

comic.

Asset Requirements 5.2

When optimized for the 2013 Kindle Fire HD 8.9”, graphic novels should maintain a 1920 x 1200 aspect

ratio. The image resolution will differ depending on the zoom factor required for Kindle Panel View.

However, Amazon recommends planning for a high quality reading experience at 2X magnification.

Images must be in the JPEG format. Amazon recommends using an image resolution of 300 dpi or 300

ppi.

There are four standard zoom factors:

Zoom

Factor

When to Use

Required

Image

Resolution

100%

Avoid using this zoom factor. It offers no magnification and poses an

accessibility challenge for users.

1920 x 1200

pixels

125%

Only use this zoom factor when it is absolutely necessary to enlarge a very

large panel. This allows the user to see a large action scene, but with the

downside of limited enlargement.

2400 x 1500

pixels

150%

This is the default and preferred zoom factor. Use this zoom factor whenever

possible.

2880 x 1800

pixels

250%

Only use this zoom factor on a two page spread image (two physical pages

are displayed at once, and content appears especially small as a result). The

downside is that the enlarged panel only represents a small portion of the

original page.

4800 x 3000

pixels

Image Quality 5.3

Image quality for graphic novels requires that images follow the resolution standards listed in section 5.2,

Asset Requirements, and maintain a consistent aspect ratio. Most importantly, optimize images for clarity

of background art as well as readability of text. These two factors guarantee the highest quality for the

graphic novel format.

Panel View (Region Magnification) 5.4

Panel View for graphic novels offers a unique reading experience. It addresses accessibility and lets

users experience the flow of action on each page in a high-resolution, easy-to-use manner. Users can

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