How do you change the source on my laptop?

To change the source on your laptop, you typically need to access the display settings or the input selection menu. If you're connecting to an external monitor or projector, you can use the function key (often labeled as "Fn") combined with a specific F-key (like F4 or F5) to switch between display modes. Alternatively, right-click on the desktop, select "Display settings," and then choose the desired display from the options available. Make sure all connections are secure and the external device is powered on.