If you are using Steam, F12 takes a screenshot.
Otherwise I use
FRAPS.
However the best way to take screenshot (for me) is to use
Nvidia Ansel. But not many games support it and you need to know Photoshop (or something like it) to process the RAW image file. The color depth is HDR and you can set it to be any super high resolution you want. I usually take Ansel photos at 8K and resize it down to 1080p.