How do I set preview as my default PDF viewer?

1. Click the Windows Key (Start Button).
2. Type Control Panel and click on the Control Panel Desktop App.
3. Choose Programs and then select Default Programs.
4. From the list of options, click Associate a file type or protocol with a program.
5. Scroll down, to find the .

1. Right-click on a file that uses the file type you'd like to change the default for.
2. Click on Get Info in the pop-up.
3. Click Open With if the section isn't already expanded.
4. Click the dropdown and choose an app.
5. Click Change All

1. Click the Windows Start button | Settings.
2. Open Default Apps.
3. Scroll to the bottom of the right column and click on Choose default apps by file type.
4. Locate the file type you need to set a default app for (PDF for this example).

1. Select any PDF file. Control-click to open the menu, and choose Get Info.
2. From the Open with: section, select your preferred application, such as Adobe Reader or Preview.
3. Click Change All button, and in the subsequent dialog box, click Continue.

1. Open the document in Acrobat.
2. Right click on the document and click on "Document properties".
3. Go to "Security" tab.
4. Select "Password security" from security method.
5. Click on "Change settings".
6. Check the box which says "Restrict editing.

1. On your Mac, click the Finder icon in the Dock, then click Applications in the Finder sidebar.
2. Do one of the following: If an app is in a folder, open the app's folder to check for an Uninstaller. If you see Uninstall [App] or [App] Uninstaller, double-click it, then follow the onscreen instructions.

Text Box Tool

1. Go to Markup > Text > Text Box.
2. Click on the Text toolbar .
3. Press T on the keyboard.

1. Open the PDF.
2. Go to Markup > Attachment. An Open dialog box appears.
3. Browse to and select the desired file, then click Open. Attachments are made individually, so only one file can be selected.
4. Click on the PDF to place the Attachment icon. Attachment icons can be moved after they have been placed.

To automatically insert additional information such as email addresses, subjects, and messages into email messages created with the email feature, create an email template.

1. Go to E-mail > Manage E-mail Templates.
2. Enter information in any of the available fields, as desired.
3. Click Save.

1. In Reader or Acrobat, right-click the document window, and choose Page Display Preferences.
2. From the list at left, select Internet and deselect Display PDF in browser, and then click OK.
3. Try to open the PDF again from the website.

1. Open Android Apps settings.
2. Now search for the app you want to change the default settings for and tap on the app settings to open the info page of that application.
3. Scroll down the page to find the button Clear defaults.

1. Right-click (Windows) or Control-click (Mac OS) the link to the PDF file.
2. Choose the appropriate save or download option.
3. Make sure Adobe Acrobat Document is selected for the file type, and save the file.
4. Locate the saved PDF, and double-click the file to open it.