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
- to view a file you do NOT wish to change.
- 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
- 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!)