There are two ways to transfer screenshots off the Nintendo Switch: with a microSD card, or through a Twitter or Facebook account.
I’m sure that any time you took an in-game screenshot of Mario Kart 8 Deluxe, The Legend of Zelda: Breath of the Wild, Super Smash Bros. Ultimate, or any other original Nintendo Switch game, you would ...
To take a screenshot on the Nintendo Switch, you'll just need to press the console's dedicated screenshot button.