c [pers [proj [org]]]
Change one or more entries. If no arguments are specified, only the
current entry is changed. % specifies wildcard match. If proj
and/or org are omitted, % is assumed for them. If arguments are
given, the search begins at the top of the file. Wildcarded fields
are not eligible for changing. You will be prompted for each new
field in order. Press <RETURN> to keep a field unchanged.