If you want to record everything that is visible on your computer screen, then use the Full Screen option. All the activity on your screen is recorded. This option is ideal if you want to make tutorials, product demonstrations, presentations, conferencing, etc.
To Make a Screen Recording of the Full PC Screen
Click File >> Record >> Recording Options >> Full Screen.
When you start recording, the application window minimizes. When the recording is in progress, My Screen Recorder Pro icon 
in the system tray flashes continuously.
Default Keyboard Shortcuts for Recording
Start/Pause: The easiest way to start a screen recording is to press the F10 function key. The F10 key also acts as a toggle to pause and resume the screen recording. When you finish recording, you may stop it with the F11 function key.
At the end of the recording, user is prompted to save the file. Now you can preview the recording in the built-in media player.
Another way to Start the recording is to right click the application icon in the system tray, and click Record.
You can change the keyboard shortcuts from the Tools menu >> Settings >> Keyboard tab.