You can control the character set, line length, password behavior, sending of ATTN interrupt, and more.
Reference the detailed IBM manaul page here.
If an error is made in the command all options specifed before the error are in effect. An alphabetic or number
cannot be used for LINEDEL, LINEND, ESCAPE, or CHARDEL symbols. Only the LINEDEL and MODE setting will survive a
disconnect - new logon. The settings otherwise are set to the system defaults.