On iPads, you can take a screenshot of what is displayed on the screen or a screenshot of the entire page of the site (or the entire PDF document) that are larger than the visible area of the screen.
To take a screenshot on an iPad with a Home button (the round button located in the center at the bottom), you need to hold down the Home button and the button on the top edge of the tablet.
If you do not have a Home button (this happens in the latest iPad models), you need to hold down the top button and the volume up button to take a screenshot.
After the screenshot has been taken, a copy of it will appear in the lower left corner. Click on it to edit the images, after editing you need to click on the "Finish" button.
If you choose Save to Photos, you can view your photos in the Screenshots album in the Photos app, or in the All Photos album if you use iCloud Photos.
On iPad, you can take a snapshot of an entire page in a website, document, or email that is larger than the iPad's screen (when viewed as scrolling). These screenshots are saved in PDF format.
If you have a "Home" button, you need to hold down the "Home" buttons and the top button as for a regular screenshot. If you do not have a Home button, then you need to simultaneously hold down the top button and the volume up button.
After a copy of the screenshot appears in the lower left corner, click on it and select "Entire Page".
To save the screenshot, select "Save PDF to Files", then select the directory where the file will be saved and click "Save".
To send a screenshot, click the button , select the sending method (AirDrop, message, mail, or through the desired application), enter the message text and click on send.