I really love the Pixel 2 XL phone, but the documentation to take screenshots is misleading and incorrect. The directions state to take a screenshot, press the power button and the volume down button at the same time.
Unfortunately, there’s a little more to it.
To take a screenshot on the Pixel 2 XL, or presumably the Pixel 2 standard, follow the above directions (press the power button and the volume down button at the same time) and hold them for two seconds. If you don’t hold the buttons for two seconds, you will not get a screenshot.
Once the screenshot is taken, you’ll see it immediately, and can save it, share it, etc.
Seems pretty simple, so I am not sure why this wasn’t made clear in the documentation.
Also, you can use “Ok Google” assistant to take a screenshot. Simply say, “Ok Google, take a screenshot” and it’ll do it without having to press the buttons.