== You can share replays, comments, and signatures via email or through Adobe’s SendNow service. Security Adobe Reader XI is the most secure version that Adobe has released. This is mainly due to the new Protected Mode, which loads potentially dangerous objects and code into a sandbox area that is isolated from the rest of the system. Speed There has been criticism of Adobe Reader’s speed compared to other lightweight PDF readers. This is true; Adobe Reader has more plug-ins and extensions than most PDF readers, which can slow things down. However, the difference for the average user is negligible, and these add-ons can be disabled if they are not needed. In terms of overall performance, Adobe Reader renders documents quickly with high detail and true color reproduction. Work has also been done in later releases to improve Adobe Reader’s impact on memory usage, so you should find that multitasking puts less strain on your system. ==