Windows

• 1
  
  
  Right-click on a blank space on the desktop. Choose "Properties" from the menu. This will open "Display Properties."
  
  
• 2
  
  
  Click on the "Screen Saver" tab.
  
  
• 3
  
  
  Enter the number of minutes in the box next to "Wait:" which is under the drop-down box of available screensavers.
  
  
• 4). Click the "OK" button.
  
  

Mac

• 1). Open "System Preferences" in the application folder.
  
  
• 2). Open the "Desktop & Screen Saver" icon.
  
  
• 3). Drag the slider to the desired number of minutes before the screen saver turns on.
  
  
• 4). Click the red "X" on the top left of the window.