Final answer:
The keyboard shortcut Ctrl+A is used to select all content within a document or window.
Step-by-step explanation:
Ctrl+A is a keyboard shortcut that is commonly used in various programs and applications to select all the content within that particular window or document. It is widely used for tasks such as copying, deleting, or formatting text, as well as selecting multiple files or folders in a file manager. For example, in a word processor, pressing Ctrl+A will select all the text in the document, allowing you to perform actions on the entire document at once.
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