For example, ctrl-a means "select all".
For ctrl-x, ctrl-c and ctrl-v, see also Cut and paste and Copy and paste.
External link
... States Census Bureau, the town has a total area of 20.0 km² (7.7 mi²). 11.4 km² (4.4 mi²) of it is land and 8.6 km² (3.3 mi²) of it is water. ...