> Back to LinkOptimizer main page
How LinkOptimizer
will save your storage space,
time and production costs
Q&A
What is LinkOptimizer?
LinkOptimizer is a utility for Adobe InDesign that allows you to reduce
the size of linked images by eliminating excessive image data.
LinkOptimizer will automatically reduce the image resolution, scale and
crop the images in Photoshop according to their dimensions in the
InDesign
document and the target resolution specified, and reimport them to
InDesign at 100%.
How LinkOptimizer will
help me?
LinkOptimizer will help you save valuable storage space, time and
reduce production costs in a variety of ways by reducing the size of
images linked to your InDesign document:
• saving valuable hard drive and backup storage space
• increasing speed of printing of your document and creating PDF files
• saving valuable time when transferring your job to service providers,
publications or any other outside sources:
-reducing time of compressing your job to StuffIt or .zip archives
-speeding up FTP or e-mail transfer
-reducing time of CD burning or copying your job to removable media
• reducing the cost of your job through faster processing by service
providers
• speeding up your overall job turnaround
How dramatic the
improvements can be?
Depending on the size of your job, the space savings from optimizing
the image sizes can be amazing. The most remarkable example in my
practice so far was a glossy auto maker brochure which went from 6 GB
to 500 MB. It's twelve times less than the original size.
LinkOptimizer can be also as helpful in preparing your really small
jobs. Let's say you have a small document which you need to send by
e-mail. The linked image is cropped and scaled down in InDesign,
however its original size is 60 MB, which is too big for e-mail
transfering. LinkOptimizer will automatically crop, scale down and
reduce
the image resolution in Photoshop for you. Depending on the project,
the image can become as small as 2 MB and ready for e-mailing.
Why would I want to
optimize the effective resolution?
Effective resolution is the resolution of the graphic after it has been
resized in InDesign. For example, if an image which original resolution
is 300 dpi is scaled down 50% in InDesign, its effective resolution
becomes 600 dpi.
Very often the effective resolution exceeds by far the resolution
that's
sufficient for printing. For example, most of high quality printed
pieces such as magazines, glossy brochures, flyers etc. don't require
resolution higher than 266-300 dpi. Most newspapers don't require
resolution more than 200 dpi. For some large format posters and
billboards the resolution can be low as 50 dpi. And, if your
project is designed for the Web, you usually don't need more than 96
dpi.
Any amount of image data that exceeds your required effective
resolution is just a waste of your valuable storage space, printing and
job handling time.
An 8.5x11 inch 300 dpi CMYK image weights about 32 MB (it's about
the size of an A4 page by European standards). If it's scaled down 50%
in InDesign, you only need about 8 MB of the image - a quarter of its
size (the size is reduced quarter-fold when you scale the image and
maintain your target resolution). LinkOptimizer will
automatically save that 24 MB (and more if image is
cropped) per image for you by opening the image in Photoshop, scaling
it down, reducing its resolution, cropping and importing it back into
InDesign at 100% of the image size at its exact location in
your document.
I can crop and scale
images in Photoshop manually, why do I need LinkOptimizer?
Sure it's possible to optimize the links manually in Photoshop and then
manually relink and adjust their position in InDesign. However, it can
be incredibly time-consuming and tedious, and can lead to mistakes as
well.
This task, depending on a project, can take several hours, and even
days. LinkOptimizer will do all this automatically for you in a
fraction of the time, with much higher precision and error-free.
I never supply collected
jobs, my final output is always to PDF. Can I still benefit from
LinkOptimizer?
Absolutely. First, LinkOptimizer can help you increase the speed of
creating PDF significantly (see the next question about the image
processing as well). The speed improvements will be especially
remarkable for large documents and when you have to create PDF multiple
times (after correcting your document, for example).
Also, when you archive or backup your job, LinkOptimizer will help you
save your valuable storage space as well as perform those tasks faster
by reducing the job size.
Why would I print my document or create PDF any faster
after cropping the images in Photoshop? I heard that InDesign sends
only visible part of the image during the output anyway.
This is not true. That is, it's only true for TIFF and native Photoshop
(.psd) images. In case of EPS, InDesign will ALWAYS send the entire
image to the printer no matter how much it's cropped in InDesign.
That is, if you have a 100 MB Photoshop EPS image placed in your
document, InDesign will always process the entire 100 MB during the
output, even if only a half of the image is visible in the document. If
you have several Photoshop EPS links in your document, the increase of
printing speed can be astonishing just by cropping those links to their
final
size in Photoshop.
In fact, InDesign doesn't introduce anything new in this area of image
processing. Even antique programs such as PageMaker 5, FreeHand 4 and
QuarkXPress 3 processed images exactly the same way: they always output
only visible part of TIFF images, and always output the entire
EPS
image.
Will LinkOptimizer tell me
how much space it saved after optimizing the links?
Yes, LinkOptimizer will tell you exactly how much space it saved in
megabytes as well as the percentage saved compared to the original size
of the links (see
screenshot below).

Will LinkOptimizer
preflight my document?
LinkOptimizer doesn't really preflight your document, however here's a
trick for you how to turn LinkOptimizer into a nice little info tool:
specify target resolution of 1 dpi and click the Analyze button.
LinkOptimizer will show you the effective resolution of all your
document's links. Obviously, don't process your images with this target
resolution after analyzing.
How do I know how long it
will take to analyze or process the links?
LinkOptimizer will always show a detailed status of the analyzing or
processing stages (see screenshot below). You will also see the
progress bars displayed by Photoshop while processing the images.
Does LinkOptimizer
compress the images in any way or change their format?
No, LinkOptimizer neither applies any compression to the images nor
changes their format.
Will my images print any
differently after being processed by LinkOptimizer?
No, your images will be printed absolutely the same way as before being
processed by LinkOptimizer.
There will be no changes in any appearance attributes of the images
such as color, brightness, sharpness etc.
What about the 1-bit
black-and-white images? They require much higher resolution than the
color and grayscale ones.
Not to worry, LinkOptimizer will ignore 1-bit black-and-white images
(which are also called "bitmap" in Photoshop or "monochrome").
How safe is the processing?
LinkOptimizer works with images in a very safe way: it processes an
image in Photoshop, reimports it into InDesign document, and then moves
to another image. It ensures that even in the case of an unexpected
event,
such as a Photoshop crash, your images will remain properly positioned
in
the document - either being processed by Linkoptimizer or in their
original position.
Do I need any special
InDesign or Photoshop plug-ins to use LinkOptimizer?
No. 
System Requirements
• Adobe InDesign CS/CS2/CS3
• Adobe Photoshop CS/CS2/CS3
• Mac OS X 10.4.2 (or later), Leopard compatible
