Type BNDS or BND in the line command area of any line and press ENTER.
The bounds line will then be displayed as follows.
=BNDS> < >
The bounds may then be changed by overtyping with < to define the left
bound and > to define the right bound. To remove the bounds line from the display, use the D line command or the RESET primary command.
Bounds are used with scrolling, shift line commands ( ">", "<", ")", "(" ),
text line commands ( "TS", "TF", "TE" ) and FIND , CHANGE , EXCLUDE , and SORT commands.