Adobe InDesign CS5 - Manual (Page 443)

437 USING INDESIGN
Frames and objects
Last updated 11/16/2011
• From Structure Use text as specified in the structure. See “ Label graphics for use with screen-reader software ” on
page 522.
• From XMP (Title |Description |Headline) Use data stored in common XMP fields. If XMP data is updated using
another application such as Adobe Bridge, when you update the link, text is updated automatically.
• From Other XMP If text string is stored in some other XMP field, enter the complete namespace and property name
in : format. For example, the Bridge user interface supports IPTC Core, which contains a field titled
“IPTC Subject Code”. If this field was where the text string is stored, then the Property value would be
“Iptc4xmpCore:SubjectCode[1].”
EPUB and HTML options
Use the EPUB and HTML options to specify image conversion settings for individual objects. If these settings are not
specified, the EPUB export image conversion settings are used. See “
EPUB Images options ” on page 125.
Custom Conversion Check to specify custom image conversion settings for selected frames.
• Size Specify if images must remain a fixed or resized relative to the page. Relative to Page Size sets a relative
percentage value based on the size of the image relative to the InDesign page width. This option causes the images to
rescale proportionally, relative to the width of the reading area.
• Resolution (ppi) Specify the resolution of the images in pixels per inch (ppi). While operating systems have
standardized on either 72 ppi or 96 ppi, mobile devices range from 132 ppi (iPad), to 172 ppi (Sony Reader), to over
300 ppi (iPhone 4). You can specify a ppi value for each object selected. Values include 72, 96, 150 (average for all
eBook devices today), and 300.
• Format Lets you choose whether the optimized images in your document are converted to GIF, JPEG, or PNG.
• Palette Lets you control how InDesign handles colors when optimizing GIF files. The GIF format uses a limited
color palette, which cannot exceed 256 colors.
Choose Adaptive to create a palette using a representative sample of colors in the graphic without any dithering
(mixing of small spots of colors to simulate additional colors). Choose Web to create a palette of web-safe colors that
are a subset of Windows and Mac
OS system colors. Choose System (Win) or System (Mac) to create a palette using
the built-in system color palette. This choice may cause unexpected results.
Select Interlace to display a slowly loaded image gradually by filling in missing lines. If this option is not select, an
image looks fuzzy and gradually becomes clear as the image reaches full resolution.
• Quality Determines the trade-off between compression (for smaller file sizes) and image quality for each JPEG
image created. Low produces the smallest file and lowest image quality.
• Method Determines how quickly JPEG graphics display when the file containing the image is opened on the web.
Choose Progressive to make the JPEG images display gradually and in increasing detail as they are downloaded. (Files
created with this option are slightly larger and require more RAM for viewing.) Choose Baseline to make each JPEG
file display only after it has been downloaded; a placeholder appears in its place until the file displays.
Custom Image Alignment and Spacing Specify the image alignment, left, center, right, and the top and bottom
padding.
Insert Page Break Select this option to insert page breaks with images. Page breaks can be inserted Before Image, After
Image, or Before and After Image.