Five ways to take a screenshot
If you want to show someone what’s on your screen (perhaps in order to give or receive technical support), there are many ways to capture an image that shows all or part of your screen, for sharing with others. Here are five practical methods for grabbing a screenshot.
22 Full screen
To capture an image of your entire screen, simply press c-Shift-3.
23 Selected area
To capture a selected area of the screen, press c-Shift-4 and then drag the rectangular marquee around the area that you want to include in the screenshot.
24 Window or object
To capture a window, a menu, an icon or any other on-screen object (along with its drop shadow, if there is one), press c-Shift-4, press the spacebar and then click the object that you want to obtain a screenshot of.
The preceding three commands (for full-screen, selected-area and window or object screenshots), save the captured image as a file on your desktop. If you would prefer to copy the image to your Clipboard, add the Control key to the shortcuts listed above.
For more capture options – including a time-delay feature, the ability to choose how the cursor appears and the option to have your system emit a confirmation sound when you make a capture – use the Grab app that comes built in to OS X (in /Applications/Utilities).
26 Third-party utilities
If you need more capabilities than OS X’s Grab can provide – for example, the ability to specify file formats on the fly, or to scale a screenshot’s size – you have many screen capture utilities to choose from.
Among the most popular of these are Ambrosia’s Snapz Pro X (US$69; www.ambrosiasw.com), Realmac Software’s LittleSnapper ($41.99 from Mac App Store) and Overtone’s Skitch (free from Mac App Store).
Create a motion capture of your Mac’s screen
27 Motion capture
Launch QuickTime Player and choose File > New Screen Recording. In the Screen Recording window that appears at this point, click the downward-pointing triangle; then choose whether to record with sound or without sound and whether to capture medium- or high-quality video. You can also opt to show mouse clicks in your recording.
To start the capture, click the red Record button. To record the entire screen, click anywhere on the screen. To record a portion of the screen, click and drag to make your selection and then click within the selection. To end your recording, simply click the Stop button.
Two ways to share a screen
If your Mac is set up on the same local network as the Mac that you wish to control remotely, you just need to ensure that Screen Sharing is enabled on both Macs (System Preferences > Sharing > Screen Sharing).
In a Finder window’s sidebar, select the Mac you wish to control or view and then click Share Screen. Enter a username and password for the Mac that you intend to control (or choose to log in with an Apple ID supported by that Mac). You should be screen-sharing in no time.
If you want to control a Mac that isn’t on your Mac’s local network, sign up for a free AIM account (www.aim.com) on each system, using a different account for each.
On each computer, launch the Messages application; in its Accounts preference, click the plus (+) button and configure your AIM account. Click the Video menu and select Screen Sharing Enabled on both Macs.
Now, when each Mac has Messages running, you can select the other Mac and choose to share its screen. Alternatively, you can sign up for a free LogMeIn (secure.logmein.com/au) account. Install the free LogMeIn server application on any Mac you wish to screen-share with and you can access and control that Mac through a web browser.
Coming next: part 3 of 100 More Things Every Mac User Should Know: System
By Christopher Breen, Dan Frakes, Joe Kissell and Dan Miller, Macworld