A user needs to use her laptop to give a presentation using a video projector. she called asking you how to switch the display to the external monitor port on her laptop. what should you tell her?

I would advise her to press the fn keyboard key along with the function key with a monitor connected on it. She should ensure that she has the correct cable to connect the laptop to the projector. Most laptops require a manual switch by pressing these combination keys but for some, they will automatically detect the external display and switch to video output