Nicole writes: In your article about changing a default program you say, “The first step is to right-click a PDF on your desktop.” But how do I right-click by tapping the trackpad of my MacBook Pro?
Hi Nicole! Yep, it’s a little weird that Mac users are constantly being asked to right-click (or “secondary” click) when their trackpads don’t have actual right-click buttons.
Never fear, though: there are actually several different ways to right-click on the MacBook’s trackpad, which (nowadays, at least) is essentially one big button.
For starters, you can…

Method No. 1:

Press and hold the CONTROL key, then click, or…

Method No. 2:

Click the trackpad with two fingertips at once instead of just one.

There are, in fact, a few different ways to right-click on a Mac trackpad.

That’s a good start—but what if you want more ways to right-click?
No problem, provided you’re willing to take a few extra steps first.
Click the Apple menu in the top-left corner of the screen, select System Preferences, click the Trackpad icon, then make sure the “Point & Click” tab at the top of the window is selected.
Now, see the “Secondary click” heading? Click the “Click or tap with two fingers” setting to reveal…

Method No. 3:

Click in bottom-right corner of the trackpad, or…

Method No. 4:

Click in the bottom-left corner.
Source: heresthethingblog.com
4 ways to right-click on a Mac trackpad

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So, you know how to snap an image of your iPhone’s screen—but what if you want to take a screenshot of your Mac’s desktop?
Well, there are actually four ways to snap a screenshot on your Mac, and they’re all just a few keystrokes away.

1. Take a screenshot of the entire screen

Press and hold the SHIFT, COMMAND, and NUMBER 3 keys, and an image file of the screenshot will appear on your Mac’s desktop.

2. Copy an image of the entire screen to your Mac’s clipboard

Press and hold CONTROL, SHIFT, COMMAND, and the NUMBER 3 keys to snap a screenshot and copy it to your Mac’s clipboard, perfect for pasting the image (COMMAND + V) into another document.

You can take a screenshot of just a portion of your Mac’s screen; press and hold Shift, Command, and the number 4 key, then click and drag.

3. Take a screenshot of a selected area of the screen

Want to capture an image of, say, just a single corner of your Mac’s desktop, rather than the entire screen?
Press and hold the SHIFT, COMMAND, and NUMBER 4 keys; when you do, your mouse pointer will turn into a target.
Click, hold and drag your mouse over the area you’d like to capture, then release the mouse button. Your screenshot will appear as an image file on your desktop.

4. Copy an image of a selected area of the screen to your Mac’s clipboard

Same basic idea as the command above, except you’re copying a picture of the selected screen area to your Mac’s clipboard.
Press and hold CONTROL, SHIFT, COMMAND, and the NUMBER 4 keys, then paste the screenshot into a document by pressing COMMAND + V.

Bonus tip

Having a hard time pressing and holding all those keys? You can create new, easier keyboard shortcuts for taking screenshots from the Keyboard preferences pane.
Click the Apple menu in the top-left corner of the screen, select System Preferences, click the Keyboard icon, then click the Keyboard Shortcuts tab.
From here, you can tweak all kinds of keyboard shortcut settings—including those for screenshots. Just click the “Screen Shots” heading in the left column to get started. (I went ahead and picked the F5 key for snapping a screenshot of the whole screen.)
Sources http://heresthethingblog.com
4 ways to take a screenshot

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