1.Snipping Tool On Windows.

Step 1: Search for Snipping Tool on windows 7/8/8.1.
 
Step 2: Select  ‘New ‘ option 
 
Step 3: Select the area you want screen shot by dragging the arrow.
 
Step 4: Edit the picture and save on hard drive.
 

2.Print Screen Key On Keyboard

Step 1: Go to the Screen you want to get screen shot of monitor.
 
Step 2:Press the ‘Print Screen’ Bottom on keyboard 
 
Step 3:Open the paint and select the selection tool and select the area want cover the screen shot on paint.
 
Step 4:Press ‘ctrl+v’ and paste on paint .