Marking Changes Without Using Line Numbers
The ZZ indicators mark a group of lines that you want Qedit to remember. Use Z to mark a single line. Note: "Z" for a single line is valid only in Visual mode; in Line mode, use "ZZ" to mark a single line. See the ZZ command in the "Qedit Commands" chapter for further information. Once marked, the lines are displayed at half-bright intensity and you can refer to them in any home line command by using ZZ where the line numbers are expected. This is especially useful when listing lines to the printer, changing or appending strings, and formatting text:
===> list $lp zz F7
===> change "bob"Robert" zz F7
===> verify zz F7 {check current ZZ range}
===> zz off F7 {cancel ZZ range}