SYNTAX            : ARG X REG

RESULTING ARGUMENT: None

FUNCTION          : Remove all characters between the current cursor
                    position and the beginning of the specified number of
                    lines forward. The removed characters are placed in the
                    register immediately following the command.

ARGUMENT          : The number of lines forward (backward if negative).

DEFAULT           : 1

NOTE 1            : Short-hand arguments Z and -Z specify all lines up to
                    the end (or beginning) of the buffer.

NOTE 2            : The previous content of the register is lost; its type
                    is set to string.

7.0:
NOTE 3            : To access the register as an array, a subscript can be
                    used.

MATRIX