Question

What is the use of UNDO command?
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Answer 1

Answer:

Undo is an interaction technique which is implemented in many computer programs. It erases the last change done to the document, reverting it to an older state. In some more advanced programs, such as graphic processing, undo will negate the last command done to the file being edited.

Answer 2

Answer:

Ctrl + Z is undo command, it changes your final step or process into its initial step or process.