Not sure of the reason it is not feasible through the SSMS GUI for the error log but as some posted before me it is also possible to modify the...

Same thing for me. No detail. I also try add child group which is the method listed on technet. I receive the message Innermost group does not...

If you right click on sql server agent and choose properties, then the text box is grayed out.

If you right click on error log whithin the sql server agent node...