Sure, your monitor looks nice out of the box, but you can make it even better.

If you see the same thing on both displays, you should start by making sure the displays are Extended instead of Mirroring ...

You can add an extra display to your Mac (and in some cases three displays). Here's what you need to connect an external monitor, including the right adapter.

If you want to set up dual monitors for sharing presentations with Zoom video, your job isn't done just yet. Here are some further tweaks you need to do.

In OS X Mountain Lion, Apple has taken an incremental step toward making OS X's new iPad-like Full Screen mode more useful: you can now pick which connected display you want to use.