1. "If you do not use a managed review (for example, if you send a PDF directly in email), you can still enable commenting rights. Open the PDF and choose File > Save As Other > Reader Extended PDF > Enable Commenting In Adobe Reader."
Problem: The Enable option is not offered (but appears without focus).
2. "Double-click Internet Options in the Control Panel. In the Internet Properties dialog box, select the Programs tab, and then select the preferred email application. Restart Acrobat to activate the change."
Problem. Only 3 applications are offered, none of which I have ever used and prefer not to use. I always use Firefox.
Europe, Middle East and Africa