Operation Manual

220
USING ACROBAT X STANDARD
Security
Last updated 10/11/2011
Find and remove hidden content
Use the Remove Hidden Information feature to find and remove content from a document that you don’t want, such
as hidden text, metadata, comments, and attachments. When you remove items, additional items are automatically
removed from the document. Items that are removed include digital signatures, document information added by
third-party plug-ins and applications, and special features that enable Adobe Reader users to review, sign, and fill PDF
documents.
To examine every PDF for hidden content before you close it or send it in e-mail, specify that option in the Documents
preferences using the Preferences dialog box.
1 Choose Tools > Protection > Remove Hidden Information. If you don’t see the Protection panel, see the
instructions for adding panels at
“Task panes” on page 8.
If items are found, they are listed in the Remove Hidden Information panel with a selected check box beside each item.
2 Make sure that the check boxes are selected only for the items that you want to remove from the document. (See
“Remove Hidden Information options” on page 221.)
3 Click Remove to delete selected items from the file, and click OK.
4 Choose File > Save, and specify a filename and location. If you don’t want to overwrite the original file, save the file
to a different name, location, or both.
The selected content is permanently removed when you save the file. If you close the file without saving it, repeat this
process, making sure to save the file.