z

[address] z [type] [count]

Print a window of text, with the line specified by address at the top. count specifies the number of lines to be displayed.

Type

+

Place specified line at top of window (the default).

-

Place specified line at bottom of window.

.

Place specified line in center of window.

^

Print the previous window.

=

Place specified line in center of window, and leave this line as the current line.