Teachers, trainers, and students deserve all the respect and support they can get and the app Reflector gives them unique help. Unfortunately, the set up instructions for the app are insufficient, so Nancy Carroll Gravley improves on those instructions so the teachers, trainers, and students can use it.

Control-clicking a document to see the Open With contextual menu is a handy way to choose exactly which app you use to open a PDF, JPG, or any other file. OS X has a problem, however, where duplicate apps can show up and make the list grow longer and longer. You can fix that issue when it crops up as long as you don't mind a quick trip to Terminal.

Emoji are the smiley-face characters you can add to text and chat messages, and those symbols are included with OS X and iOS. All you need to know is where to look. All we ask is that you use your Emoji responsibly.

Speaking of Java updates, Apple also issued an update for the Apple-provided system Java SE 6 to version 1.6.0_43. Apple hasn't yet posted the specifics for this update, but it likely incorporates the same fixes Oracle addressed earlier on Monday with its Java browser plugin patch.

If you routinely need to use the same settings when printing documents from your Mac it quickly becomes a pain to make those changes every time. Turns out OS X has had a feature to save your custom print settings for a long time, and it's hiding in plain sight.

The Preview application is included with every Mac. Among other things, this useful utility allows you to annotate your PDF files with highlighted text, shapes, lines, arrows, text boxes, sticky notes and more. Sandro Cuccia shows you how.

Java has been showing its security flaws a lot lately, pushing some OS X users to remove the platform from their Macs. Killing Java outright is great for some Mac users, but there are plenty that need it for apps like Photoshop and InDesign, so simply disabling it in your Web browser is a nice compromise, and it's easy to do.

A new malware threat for the Mac has been discovered that can work around OS X's Gatekeeper security feature. The threat, dubbed "Pintsized," can create a secure remote connection to victim's user accounts, and then scour their hard drive for personal information.

As promised, Apple released an update for Java on Tuesday that addresses an exploit used to attack some of Apple's own Macs. Java for OS X 2013-001 1.0 updates Apple's Java implementation of Java SE 6 to version 1.6.0_41, and is being released for OS X Lion and Mountain Lion. [Updated with additional information]

Using Finder's "Go to Folder" command is an easy and quick way to jump around in your file system. Need to go to a hidden folder or a folder buried several layers deep? No problem. Also, you can use this same feature in another place around your Mac, a place you may not have expected. Ooooo, the suspense is killing us.