The following commands give various types of information:

    Command                                 Special     Single command arguments
    CTRL_T  Copyright                       Immediate        -    -    -    - 
    CTRL_T  Progress                        Interrupt        -    -    -    - 
      HELP  Function Key HELP               Interrupt        0    -    -    - 
         !  Remark                                           0    -    -    - 
        :H  Help-information                                 0    -    -    - 
        :M  Message                                          0    1    -    -     (1:7.0)
         T  Show line                                        0    1    -    - 
         =  Show parameters                                  -    1    2    3