Sandro Cuccia revisits Preview in OS X. He shows you how to have the latest Mountain Lion version of this versatile app easily scan and store one or more signatures for later insertion into any PDF document.

If you're like Michael, you probably have lots of apps running on your Mac at any given time. Using the Application Switcher is a great way to jump between open apps, but there's a lot more than meets the eye. There are four other keys that, when combined with Command and Tab, will help you deal with running multiple apps better than ever.

If you use a device which can receive audio via AirPlay, or even just switch your Mac's audio output device, you can do that without any extra software. It's easy, and most anyone that's keeping OS X up to date can do it.

Mac Geek Gab listener Joe prefers to archive copies of his email messages for reference, but doesn't always want to keep the associated email attachments which are often unnecessary and take up valuable drive space. We show him how to use a little-know feature of Mail to remove attachments from email messages.

Sandro Cuccia continues his exploration of free apps preinstalled by Apple. This time it's the newest version of the previously maligned Notes app. Now, Notes comes to Mountain Lion. Its key feature: iCloud integration for syncing to iOS devices. Guess what…it works. Notes is sure to be a bonus enhancement to everyone's workflow.

It's no secret that apps on your iPhone, iPad, and iPod touch can track your location, but you may not realize Mac apps can do the same, too. You can, however, control which apps know where you are on both platforms, and it's easy to do.

Whoops! You accidentally typed something into Safari's Smart Search field, and then you realized that you don't want to navigate away from the original page. You could, of course, copy and paste your search into a new tab or window, but Melissa Holt's got a better way to do things. And we understand that if we're really nice to her, she might even tell us what she knows. Maybe.

Apple released Digital Camera RAW Compatibility Update 4.05 late on Thursday with support for several new Fujifilm cameras. The update lets iPhoto '11 and Aperture 3 running on OS X Mountain Lion to import Raw format images from a longer list of digital cameras.

Apple released iPhoto 9.4.3 Tuesday afternoon with improved support for iCloud's Photo Stream feature. iPhoto is Apple's image management and editing app and is part of the company's iLife suite of creativity apps.

Apple released Safari 6.0.4 for the Mac on Tuesday with fixes for several security-related issues. The update targets Safari running on OS X Lion and OS X Mountain Lion and adds the ability to enable the Java plug-in on a site-by-site basis.