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Reducing PDF file size - What is Document Overhead?

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2011-08-31 11:42:12
robcub
Registered: Jan 23 2010
Posts: 5
Answered

Hello,
 
I have created an Interactive PDF from a 110 page InDesign (CS5) doc .
 
I'm sure I can reduce the filesize down from 6.4MB it has ten really small images and an EPS logo on every page (it only has a few internal anchor links as interactivity.
 
When I go to Save As... PDF Optimizer in Acrobat X Pro – reducing the image size does not significantly reduce the file size. So I think there must be something else that is in there causing the large size.
 
In the Audit Space Usage I have Document Overhead at nearly 80% whereas images are 6%.
 
What is Document Overhead? What settings can I do to reduce it in Optimized PDF?

My Product Information:
Acrobat Pro 10.1, Macintosh
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2011-08-31 11:56:00
#1
KellyMcC
Acrobat 9ExpertTeam
Registered: Jul 11 2011
Posts: 389
Accepted Answer
Robcub,

The Document Overhead is User & Application data in the file. You can use the PDF Optimizer, check the Disgard User Data Panel and check Disgard Private Data.
Discard Private Data Of Other Applications Strips information from a PDF document that is useful only to the application that created the document. This does not affect the functionality of the PDF, but it does decrease the file size.

Kelly McCathran
Adobe Community Expert
Certified Technical Trainer+

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2011-08-31 13:14:07
#2
robcub
Registered: Jan 23 2010
Posts: 5
Thankyou very much for your help Kelly. I did what you suggested but the file size only reduced to 6.1MB from 6.4MB. I've done another experiment and checked more of the options in the Disgard Private Data panel and it reduced massively to less than a meg! However the links in the document (internal and external) ceased to work.

So I'm going to carry on experimenting.
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2011-08-31 13:55:11
#3
robcub
Registered: Jan 23 2010
Posts: 5
It was "Discard all comments, forms and multimedia" that was the culprit. When I check (disgard) that the file size is reduced massively but all the internal and external links disappear – including the EPS logo on each page which has a hyperlink on it :(
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2011-08-31 14:15:47
#4
KellyMcC
Acrobat 9ExpertTeam
Registered: Jul 11 2011
Posts: 389
This page will tell you what each option does on the Disgard User Data Panel: http://help.adobe.com/en_US/acrobat/pro/using/WS58a04a822e3e50102bd615109794195ff-7c84.w.php

Kelly McCathran
Adobe Community Expert
Certified Technical Trainer+

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2011-08-31 14:38:38
#5
robcub
Registered: Jan 23 2010
Posts: 5
Thank you, Kelly
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