"Screenshots" that visualize what you see on the display are one of the most frequently used basic functions of iOS. Rare moments in the app, such as the "commemorative scout" when you get the highest score in the game, can't be left without the screenshot feature.
However, the screenshot is just "as it is displayed on the screen". If you actually have super-vertical data like a web page, but you are displaying a part of it (scrolling the screen up and down), take multiple screenshots and stitch them together manually. Will be. It's quite troublesome, isn't it?
With iOS 13, you can now take ultra-vertical screenshots only when using Safari. Although pages that are too long are not targeted and the only format that can be saved is PDF, you can leave a screenshot of a web page that you should be able to display by scrolling in Safari.
The procedure is simple, take a screenshot (side button + volume up button) while browsing the target WEB page in Safari, and tap the thumbnail image that appears at the bottom left of the screen. Then select the "Full Page" tab on the edit screen and tap the Finish button at the top left of the screen to save it as a PDF. If you tap the share button on the upper right of the screen instead of the finish button, you can also attach AirDrop or email.
Note that if you take a screenshot before the page has completely loaded, you will end up with a PDF with some images and text missing. If you access a web page with a large number of images, wait a while before starting work.