Command help

You can view a list of all major and immediate commands and the accompanying one-line help for each command by typing H.MJ starting in column 1 of any line except the INFO-line.

If you need more information about a command, its meaning or available options, type a forward slash (/) in column 1 of the command line to see the available help:
Figure 1. Using a slash to obtain extended help for a command
________________ ZTKALL   VTM     CICSR41L V530./C SYS  05/27/13 16:48:12     
>ATF                                                                           
>       Controls the Application Trace Facility data collector.               +
>                                                                              
>       Type of Command:  Immediate                                            
>                                                                              
>       Command Format:  ATF <aaaaa>                                           
>                                                                              
>        1 | 2    |  Definition of operands                                    
>       -----------------------------------------------------------------------
>          | ATF  |          Blank displays current status.                    
>          |      | <START>  Starts the Application Trace Facility collector.  
>          |      | <STOP>   Stops the Application Trace Facility collector.   
>                                                                              
>       ONDV must be active in order to record trace data.  The ATF command    
>       will generate the ONDV START command if ONDV is not already active.    
>                                                                              
>       The level of detail trace information collected for third party        
>       products depends on whether task and file monitoring are enabled for   
>       the third party product, either dynamicall using the COLL command, or  
>       specifying AUTO_START=YES in the global data module.                   
>                                                                              
>       If ONDV is already running, the ATF command will generate the          
>       ONDV STATUS command.                                                   

For detailed information on command help, see Major, minor, and immediate command help.