Yes, you can do this in your DDS.
You need to look at the IBM Manual — DDS Reference: Display Files
Look at the keyworks that start with HLP
You can define various area on your DSPF that will display different documents.
REGISTER or login:
monmsg ( cpf0000 mch0000 ) exec( goto Std_Err )
/* Fall through for exit... */
monmsg ( cpf0000 mch0000 )