Additional information available:

ATTACHCREATEDEFINEDELETEEXITHELPLATCP
RECALLREFRESHSETSHOWSPAWNZERO

usage summary

   To invoke LATCP, enter RUN SYS$SYSTEM:LATCP at the DCL command
   prompt. At the LATCP> prompt, you can enter any of the LATCP
   commands. These commands follow the standard rules of command
   line syntax as specified in the VMS DCL Concepts Manual.

   To exit from LATCP, enter the LATCP EXIT command at the LATCP>
   prompt or press CTRL/Z.