Second from the left is a USB-C that supports DisplayPort.

Photo by Monica Chin / The Verge Second from the right is an HDMI port (it’s labeled). You can also look for symbols next to the port. Not all USB-C ports support DisplayPort and Thunderbolt 3, so double-check that on the manufacturer’s website. Here are some examples: To the left of the vents is a USB-C port that supports DisplayPort and Thunderbolt 3. You should be able to find a list on the manufacturer’s website or in reviews of your laptop model.

If you’re not sure what ports you have, a quick Google search can help you out. If you have an older computer, it may be VGA or DVI (the ones that are covered in holes).

It’s likely going to be HDMI, mini-HDMI, a USB-C port with Thunderbolt and / or DisplayPort support, DisplayPort, or Mini DisplayPort. The first step is to figure out what outputs your laptop supports. Any modern laptop should be able to connect to whatever external monitor you have, but you may need to get creative. It doesn’t matter how big your laptop’s screen is - if you’re going to be doing any serious multitasking for work or school, connecting a monitor can be a big help.