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 the top of the window (default).

-

Place specified line at the bottom of the window.

.

Place specified line in the center of the window.

^

Print the previous window.

=

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