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3 In the JavaScript Security panel, set options to manage JavaScript: as needed.
Enable Acrobat JavaScript
Uncheck to disable JavaScript completely or restrict JavaScript through APIs.
Enable Menu Items JavaScript Execution Privileges
Enables executing JavaScript by clicking menu items. When off,
privileged JavaScript calls can be executed through the menu. Executing non-privileged JavaScript calls through
menu items is not blocked whether this box is checked or not.
Enable Global Object Security Policy
Allows JavaScript globally through APIs, or trusts specific documents
containing JavaScripts.
Alternatively, you can modify your system registry settings to manage JavaScript execution.
For details, see the Application Security Guide at www.adobe.com/go/learn_acr_appsecurity_en.
Attachments as security risks in Acrobat Reader DC and
Acrobat DC
Note: For a full list of articles about security, see Overview of security in Acrobat and PDF content .
Attachments represent a potential security risk because they can contain malicious content, open other dangerous files,
or launch applications. Acrobat DC and Acrobat Reader DC always let you open and save PDF and FDF file
attachments. Acrobat DC and Acrobat Reader DC recognize certain files, such as those whose names end in .bin, .exe,
and .bat, as threats. You can’t attach such files. Acrobat DC does allow you to attach files that cannot be saved or opened
from Acrobat DC, such as ZIP files. However, this practice is not recommended.
Acrobat DC and Acrobat Reader DC maintain a white list of file types that can be opened or saved, and a black list of
file types that cannot. You are allowed to attach file types that are not on either list. However, when you open or save a
file of an “unrecognized” type, you see a dialog box asking whether you trust the file type.
For details, see the Application Security Guide at www.adobe.com/go/learn_acr_appsecurity_en.
Manually add a file type to a black or white list
Administrators can modify the black or white list through the registry. Users can manually add a new file type to a black
or white list by attaching the file and then trying to open it.
1 Choose Tools > Edit PDF > Attach A File.
2 Add a file type that is not in the black or white list.
3 Right-click the file in the Attachments pane on the left and choose Open Attachment.
4 In the Launch Attachment dialog box, select one of the following options, and then click OK:
Open This File:
Opens the file without changing the registry list.
Always Allow Opening Files Of This Type:
Adds the file type to the white list and prevents future warnings.
Never Allow Opening Files Of This Type:
Adds the file type to the black list and does not open it. You can possibly
attach a file of this type to a PDF, but you can’t open it.
Note: To restrict a file type that you permitted in the past, reset (restore) attachment permissions in the Trust Manager
Preferences.
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Reset (restore) attachment permissions
Because the list of allowed and disallowed file attachment types can grow over time, you can reset the lists to their
original state. This state can sometimes provide the highest level of security.
1 Choose Edit > Preferences (Windows) or Acrobat DC/Acrobat Reader DC > Preferences (Mac OS).
2 From the Categories on the left, select Trust Manager.
3 In the PDF Attachments panel, click Restore. The Restore button is available only if you changed the attachment
defaults.
Allow attachments to start applications
The Trust Manager lets you control whether non-PDF attachments can start their associated applications.
1 In the Preferences dialog box, select Trust Manager from the Categories on the left.
2 Select the option Allow Opening Of Non-PDF File Attachments With External Applications. You must have the
external applications to open the files.
Allow or block links to the Internetin PDFs
Note: For a full list of articles about security, see Overview of security in Acrobat and PDF content .
Clicking any link to the Internet poses a potential security risk. Malicious websites can transfer harmful content or
silently gather data. If you are concerned about these risks, you can configure Acrobat DC and Acrobat Reader DC to
display a warning when a PDF attempts to connect to an Internet site.
You can allow Acrobat DC and Acrobat Reader DC to contact selected websites by adding their addresses (URLs) to
your list of trusted websites in the Trust Manager preferences. Alternatively, you can allow all URLs.
Note: If the options in the Manage Internet Access dialog box are disabled, select Custom Setting. If options are still disabled,
your product could be under an administrator’s control with those restrictions in place.
1 Choose Edit > Preferences (Windows) or Acrobat DC/Acrobat Reader DC > Preferences (Mac OS).
2 From the Categories on the left, select Trust Manager.
3 Click Change Settings to specify the default behavior for accessing the Internet from PDFs.
4 Choose from the following options:
• To allow access to all URLs, select Allow PDF Files To Access All Web Sites.
• To restrict access to all URLs, select Block PDF Files’ Access To All Web Sites.
• To restrict access to only the URLs you specify, select Custom Setting.
• To add a website, type its URL in the Host Name text box and click Allow or Block.
• To remove a URL you no longer want to visit, select the website in the list and click Delete.
• To specify what the program should do with websites not in your custom list, select one of these options: Always
Ask, Allow Access, Block Access.
For more information, see the Application Security Guide at www.adobe.com/go/learn_acr_appsecurity_en.
Note: If you open a protected PDF and receive a prompt to allow or block a URL, select Remember My Action For This Site.
This reply adds the URL to this list.
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Chapter 10: Electronic signatures
Sign PDF documents
You can sign a document to attest to its contents or approve the document. Based on the intent, you use different types
of signatures.
This document provides instructions for Acrobat DC. If you're using Acrobat Reader, see What can I do with Adobe
Reader. If you're using Acrobat XI, see Acrobat XI Help . And, if you're using Acrobat 8, 9, or 10 see previous versions
of Acrobat Help.
Sign a PDF
To sign a PDF document or form, you can type, draw, or insert an image of your handwritten signature. You can also
add text, such as your name, company, title, or the date. When you save the document, the signature and text become
part of the PDF.
You can also capture a picture of your signature on mobile using Adobe Acrobat Reader DC mobile app and save it in
Adobe Document Cloud, so that it's synced and available for use across your desktop and other mobile devices. For more
information, see Capture your signature on mobile and use it everywhere.
1 Open the PDF document or form that you want to sign.
2 Choose Tools > Fill & Sign.
3 To add text, such as your name, company, title, or date, drag and drop your personal saved information from the
right hand pane onto a form field.
Alternatively, you can use Add Text
in the toolbar. Click at the place in your document where you want
to add the text, and start typing. Use the field toolbar to make appropriate changes.
4 Click the Sign icon
in the toolbar, and then choose whether you want to add your signature or just
initials.
If you have already added signatures or initials, they are displayed as options to choose from.
5 If you've already added your signature or initials, just select it from the Sign options, and then click at the place in
the PDF where you want to add your signature. Skip to the next step.
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If your are signing for the first time, you see the Signature or Initials panel. Below is an example of the Signature
panel.
Type
Type your name in the field. You can choose from a small selection of signature styles; clickChange Style to
view a different style.
Draw
Draw your signature in the field.
Image
Browse and select an image of your signature.
Save Signature
When this check box is selected, and you're signed in to Acrobat Reader DC or Acrobat DC, the
added signature is saved securely in Adobe Document Cloud for reuse.
Click Apply, and then click at the place in the PDF where you want to place the signature or initial.
6 To move the placed signature or initial, click the field to highlight it and then use the arrow keys. To resize or delete
the field, use the options in field toolbar.
If you want to use an image as your signature:
•Sign your name in black ink on a clean, blank sheet of white paper. Sign in the middle of the paper so you don't
photograph or scan the edges.
• Photograph or scan your signature. If you are taking a picture of your signature, make sure that the page is lit and
that no shadows fall across the signature.
• Transfer the photo or scan to your computer. Acrobat/Reader accpets JPG, JPEG, PNG, GIF, TIFF, TIF, and BMP
files. You do not need to crop the image. Acrobat/Reader imports just the signature if the photo or scan is fairly clean.
Send and track your signed PDFs
You can send signed PDFs to others and get notified when recipients view it using the Send & Track service. A copy of
your document is stored in Adobe Document Cloud account so that you can easily access it later. You can sign in to the
account with your Adobe ID.
When the document is complete, click Send & Track in the right hand panel under Send Options. For further
instructions, see Share large files online using Send & Trackhelp.
Get PDFs signed by others using Adobe Sign
You can get documents signed by others using the Send for Signature tool, which relies on cloud services provided by
Adobe Sign. It lets recipients quickly sign documents from anywhere using a web browser or mobile device.
Documents you may be interested
Documents you may be interested