Final answer:
The keys to navigate to the previous or next screen are Page Up and Page Down. These keys help in moving quickly through long documents or webpages. Their functionality can vary depending on the software and platform.
Step-by-step explanation:
The keyboard keys that allow you to move to the previous or next screen are Page Up and Page Down respectively. Page Up is used to navigate to the previous screen or move upwards through a document, and Page Down is used to navigate to the next screen or move downwards. These keys are particularly useful when you are working with long documents or web pages and you need to quickly move through them. Other keys like Esc typically close menus or dialog boxes, and the Ctrl key is often used in conjunction with other keys to perform shortcuts.
For example, when viewing a document in Adobe Acrobat on a Mac, the forward and backward navigation through pages can be done using cursor/arrow keys. However, this functionality may vary depending on the software and the platform you're using. Some programs may allow additional navigation options, like using back and forward functions with specific keys or even mouse buttons, especially in the case of gaming mice with extra buttons.