Adobe Acrobat XI Manual de usuario descargar pdf (Pagina 574)

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Preflight (Acrobat Pro)

Last updated 1/14/2015

Property groups

The properties for defining a check are grouped in categories. You can view a list of all property groups in the Edit

Check dialog box. In addition, you can view the individual properties that make up each group, as well as an

explanation of how the Preflight tool uses the properties.

The following property groups are available:

Text Includes information about how text is rendered, whether it is scaled anamorphically or slanted, or whether it can

be mapped to Unicode and thus copied or exported correctly.

Font Describes all aspects of a font in which text is rendered. Note that text size is a text property, not a font property,

because a font can be used at many sizes throughout a PDF document. Text size is included in the Text property group.

Image Includes image resolution, bit depth, number of pixels, rendering intent, and more.

Colors Includes color characteristics, such as color spaces, alternate color spaces, patterns, and spot colors. Alternate

color spaces enable Acrobat to display or print certain spot colors and multicomponent spot colors (DeviceN). For

example, to reproduce the color orange on a monitor or printer, the PDF requires an alternate color space (made up of

RGB or CMYK colors) that defines what the spot color looks like.

ICC Color Spaces Includes properties for accessing the characteristics in the embedded ICC profiles, which define the

ICC color spaces. ICC profiles contain data for translating device-dependent color to a device-independent color space,

such as Lab. This helps you reproduce color consistently across different platforms, devices, and ICC-compliant

applications (such as Adobe Illustrator and Adobe InDesign). A document that contains objects in different color

spaces (such as RGB, CMYK, and Grayscale) could have different ICC profiles for calibrating the color for each color

space.

Graphic State Properties For Fill Includes graphic state information about how areas are filled, particularly the color

values of the current color space.

Graphic State Properties For Stroke Includes graphic state information about how lines are drawn, particularly the

color values of the current color space, as well as line-specific properties, such as thickness.

General Graphic State Properties Includes settings that control how text, graphics, or images are displayed in a PDF

page. Overprint settings, for example, are included here.

Halftone Includes graphic state settings relevant to prepress operations, such as screen angles, frequencies, and spot

shapes.

Page Description Includes general information about objects on a PDF page, such as the type of object (for example,

whether it is an image, a piece of text, or a smooth shade) or whether it is inside or outside the viewable area of the page,

or how far it is from the trim box.

OPI Includes properties for analyzing all existing OPI links (comments), whether from OPI version 1.3 or 2.0. The

possible OPI entries in a PDF are the same as in PostScript files.

Embedded PostScript Refers to the PostScript code that can be embedded into the PDF. There are three properties: one

for a PostScript operator used directly in a page description; one for PostScript code embedded in a PostScript XObject;

and one for an early form of a PostScript XObject, a PostScript Form XObject.

Object Metadata Includes information embedded with the object, such as its creator, resolution, color space, copyright,

and keywords applied to it. For example, if a Photoshop image with metadata is placed in an InDesign document, and

the document is converted to PDF, this information can be retrieved and checked by properties in this group.

Annotations Includes most characteristics of comments and drawing markups, traps, and printer marks.

Form Fields Includes properties for form fields.

Layers Checks for optional content, which sometimes affect the appearance of a page.

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Adobe Acrobat XI Manual de usuario Pagina 574

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