What is undo?

The undo function is a feature in many computer software applications that allows users to reverse or cancel their previous actions. It is commonly represented by a curved left-facing arrow icon in most applications. The undo function is a useful tool for people who make mistakes or want to experiment with different options without worrying about making irreversible changes. When a user presses the undo button, the application will typically undo the most recent action, allowing the user to return to the previous state of their document. The undo function can undo multiple actions in some applications, and users can typically redo their previous actions using the opposite function, known as redo.