Free software that allows you to record your computer screen is available for Windows, Ubuntu and Mac systems. You can use BB FlashBack Express 5 for Windows systems, Kazam for Ubuntu systems and QuickTime Player for Mac systems. Each of these programs has similar recording options, such as whether to record the whole screen or a specified area and whether or not to include sound from the computer or a microphone.
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Record the Screen in Windows 8
Open BB FlashBack Express 5 and click "Record Your Screen" to get started.
Click the "Record:" drop-down menu and choose what you want to record. Choose "Fullscreen" to record everything from one or more entire monitors. Choose "Region" to record a specific area you specify. Choose "Window" to record the contents of an open window. Check the "Record Sound" check box if you want to record sound from the software or your voice from a microphone. You can also record from a webcam and choose to minimize the recording software while it records. When you are finished setting up the recording environment, click the "Record" button.
Click the "Pause" button to pause the recording software if you need to take a break, and click the "Stop" button when you have finished recording.
Select "Save" to save the recording you made. If you aren't satisfied and want to try again, click "Discard."
Navigate to where you want to store the file, name it and click "Save."
Record the Screen in Ubuntu
Open Kazam and choose "Screencast" to record the screen. If you just want one image, choose "Screenshot." Choose the region you want to record from among Fullscreen, All Screens, Window and Area (a region that you specify). Check the appropriate check box if you want to include the cursor, sound from the speakers or sound from a microphone in your recording, set a time delay if you want and click "Capture."
Click the video camera icon on the menu bar to pause the recording if you need to take a break. When you are done, click "Finish recording."
Choose between editing the video with video-editing software you have installed or saving the video as is. For this example, click the radius button next to "Save for later" and click "Continue."
Navigate to the location where you want to store the recording, name it and click "Save."
Record the Screen on a Mac
Double-click "QuickTime Player" in the Applications folder.
Choose "New Screen Recording" under the File menu.
Choose the audio for the recording from the drop-down menu. You can choose to have no audio or choose from digital or line input options. You can also choose to visually show when you click the mouse in the recording or not.
Click the "Record" button to start the recording.
Decide whether you want to record the full screen or an area you specify. To record the full screen, click anywhere to begin. For a specific area, click and hold the mouse in one corner of the area you want to record and drag it to the opposite corner, creating a rectangular or square shape. Release the mouse.
Click "Start Recording" when you are ready to begin.
Click the "Stop" button on the menu bar when you have finished recording.
Click the "Play" button to view your recording. Click the share icon, a box with an arrow pointing out of it, to send the recording to various social networking systems or email.
Choose "Save..." under the File menu to save the recording.
Name the file. Choose where you want to store the file from the drop-down menu "Where." When you are finished, click "Save."