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3.3 Error Recovery

When in doubt, press <ESCAPE> to be certain you are in command mode. If strange things are happening, make sure the Caps Lock is not on.

Remember to use

view
to view a file you do NOT wish to change.
:q
to quit a file you opened and do NOT wish to change, or to close a file you did not mean to create (and into which you did not insert text).
:q!
to quit a file you unintentionally created, and into which you inserted text. (Be careful with this command so that you do not lose changes you wished to keep!)