Adobe 5.5 Design Standard Manual de usuario Pagina 30

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Adobe Creative Suite 5 Printing Guide 28
Layer overrides to placed files
The Layer Overrides (Object > Object Layer Options) in InDesign allow
a designer to control the display of layers in Photoshop, Illustrator, or
PDF files from within InDesign CS5/5.5. A designer can even apply
different layer visibility overrides to different instances of the same
source file. Wise use of this technique can reduce the number of images
that need to be tracked, transported, and managed, while also giving
designers new flexibility and simplified file management. Applying layer
overrides does not alter the original layered file; it only affects how the
file displays in InDesign; files with layer overrides output as they appear
on screen. Graphics governed by Object Layer are indicated in the Links
panel with a “Yes” in the Layer Overrides column, followed by a number
indicating how many layers are affected.
Object Layer Options
Layered graphics whose appearance is aected by Object Layer Options are indicated by a
Yes” in the Layer Overrides column. A number in parentheses indicates how many layers
are aected.
When performing any edits in Photoshop to a file using Layer
Overrides, be mindful that your actions may affect multiple instances of
the image. Don’t delete any layers during editsthey may be needed in
some instances of the image. Don’t flatten the original source files for
images affected by layer overrides. If your shop has historically advised
flattening Photoshop layered files placed in InDesign, be sure to advise
customers and staff not to flatten when layer overrides are used.
Maintain the layer names, stacking order, and layer comp definitions in
each layered source file unless you need to alter the file. When these
layering attributes are altered in the original file after layer overrides are
applied in InDesign, the link becomes invalid in InDesign and the
appearance of the file may change when the link is updated. This does
not create an output issue if the resulting changes in appearance are
intentional. The Layer Options dialog box offers the choice of honoring
InDesign’s overrides when updating a graphic or “starting over” with the
saved file’s layer visibility settings. Even if you choose to honor
InDesign’s overrides when updating, any new layers you’ve added will
automatically be visible.
Raster-based Photoshop DCS and EPS files
Desktop Color Separation (DCS) files may still be used by some
customers who need to include spot color plates in their color images.
Because DCS files are pre-separated, it can be a challenge to integrate
them into some prepress workflows. InDesign CS5/5.5 automatically
merges DCS 2.0 files created from Adobe Photoshop during printing or
export, so it’s easier to reuse legacy files. These enhancements are
made possible because InDesign reads Photoshop DCS and EPS files as
images. Reading these file types as images yields another benefit:
Photoshop EPS files can be color-managed if an ICC profile was
embedded. However, it is recommended that you replace such legacy
files with Photoshop native PSDs or PDFs, which provide full support for
spot-color content without resorting to the old DCS format.
For an EPS or DCS file to benefit from these features in InDesign, the file
must meet the following requirements:
•e le must be created by Photoshop.
•e le must be an 8-bit le. e CMYK, RGB, and gray color models
are supported. It can include spot colors, and it can be a multitone le
(such as a duotone).
•A DCS le must not be saved with the Include Vector Data option
selected. (Clipping paths are supported without this option selected.)
•DCS les must conform to the DCS 1.0 or 2.0 specication.
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