A: The body of a PDF file is composed entirely of COS objects. They are the basic PDF building blocks and come in a a variety of types; strings, integers, arrays, etc.. Inside the PDF they are arranged in a tree structure. PDF CanOpener displays this tree structure in a Windows Explorer like fashion and allows you to edit the COS Objects.
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A: PDF CanOpener has both a menu item (under the Acrobat Advanced menu) and a toolbar button (On the Advanced Editing Toolbar). If these items do not appear then there may be another problem.
PDF CanOpener is a Windows only plug-in. Sorry, no Mac Version. It operates on Acrobat 5.0 Exchange, 6.0 Standard and Professional, and 7.0 Standard and Professional. It will not operate on versions of Acrobat earlier than 5.0 or on Acrobat Reader.
If you have the correct operating system, and version and type of Acrobat then check the Acrobat plug-ins folder to make sure that the PDF CanOpener installed to the correct location. Typically the plug-ins folder is located at:
C:\Program Files\Adobe\Acrobat 7.0\Acrobat\Plug_ins\WindJack
If you have multiple versions of Acrobat on your system it may have installed into a different location than you think.
A: Yes, PDF CanOpener is a single user license. You may use with all of your copies of Acrobat as long as those copies are all on the same system. You may not share it with other users or install it on multiple systems.
As you've noted, PDF CanOpener installs to only the latest version of Acrobat on the system. It must be manually copied into the plug-ins folder for the other Acrobat versions. All versions of Acrobat have a similar folder structure. PDF CanOpener is placed in a sub-folder of the Acrobat Plug-ins folder, located at:
C:\Program Files\Adobe\Acrobat 7.0\Acrobat\Plug_ins\WindJack
The easiest method is to copy the entire "WindJack" folder to the plug-ins folder in the other versions of Acrobat. But simply copying the "PDFCanOpener.api" file will work just as well.
A: The installer registers PDF CanOpener with the Windows Operating System so it is listed in the Add/Remove Programs tool. Activate the Add/Remove Programs tool. Scroll down the program list to find and select PDF CanOpener. Right click on the selection and then click the "Remove" button.
This action will only remove the officially installed plug-in. If you have manually copied PDF CanOpener to another version of Acrobat you will have to manually delete it.
A: As a convenience, PDF CanOpener uses existing "Tabbed" Acrobat Windows to display the COS Tree. These windows are also referred to as the "Navigation Tabs" in the Acrobat "View" menu. It can use any one of these windows, but defaults to displaying in the "Signatures" window. The tree display is simply drawn over top of the existing window and does not affect it in any other way.
The advantage to using these windows is that they are conveniently placed and can be easily hidden and un-hidden. These windows are initially docked into the application window, but may also be set as floating windows by simply grabbing the tab and moving it with the cursor.
The specific window PDF CanOpener uses can be changed in the PDF CanOpener Preferences, under the "Edit->Preferences-PDF CanOpener..." menu item.
A: The PDF CanOpener Demo is a fully functioning version. Editing is turned on and off from the PDF CanOpener Preferences dialog, activated with:
"Edit->Preferences-PDF CanOpener..."
Check to see if editing is enabled, if it is not choose the editing option(s) you want as explained below.
The "General" tab has 3 options that relate to editing.
- Allow all operations - Not recommended. This option allows you to edit virtually any COS Object in the PDF. Editing some of the COS Objects will damage the PDF (since there are certain structural expectations) and should not be edited, ever.
- Modify - Recommended. Allows you to modify the value of COS Objects.
- Delete - Recommended. Allows you to delete COS Objects.
A: PDF CanOpener is the ideal tool for learning about the PDF internals. But No, PDF CanOpener will not work with Reader. It requires the Standard or Professional version of Acrobat 5, 6, or 7.
A: Sorry, No, since PDF CanOpener is a plug-in for Acrobat, the file must be opened in Acrobat before PDF CanOpener can be used.
A: The answer is a conditional yes. Since PDF CanOpener edits the PDF at the COS level it can perform virtually any structural or content changes. However, This is not a recommended use for PDF CanOpener. PDF CanOpener is best used for analyzing PDFs, doing minor fixes, and prototyping PDF manipulations (for software development). It is the essential tool for the person who is going to write an Acrobat plug-in that removes watermarks
A: Yes, PDF CanOpener exposes the complete low level structure of the PDF so all the information is there. However, you need to know a little bit about PDF internals to find and interpret this info.
Easy access to this type of information has been a frequent request. So the upcoming PDF CanOpener update will include popup windows that display this and other information for every page content object. Stay tuned
A: PDF CanOpener can both extract and import the contents of any stream object, encoded or decoded.
A: Bad can mean a lot of different things. If the object is bad in a file structure kind of way then Acrobat will either repair the file when it is opened or refuse to open it. So by the time PDF CanOpener is available the object data has been fixed. When this happens Acrobat will sometimes refuse to let PDF CanOpener operate on the broken PDF. The file should be saved and reopened.
Bad can also mean that the PDF Object structure is wrong. For example, if a page rectangle object only had 3 elements (it's supposed to have 4), or the bookmark dictionaries where built improperly. Acrobat will usually open files with these kind of problems, skipping over the bad parts of the file and displaying only the good parts. PDF CanOpener is perfect for finding and repairing these types of problems, but it doesn't specifically flag problem items, you'll have to find them yourself.
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