You can edit from
...addons\sourcemod\configs\core.cfg
Code:
/**
* String to use as the public chat trigger. Set an empty string to disable.
*/
"PublicChatTrigger" "!"
/**
* String to use as the silent chat trigger. Set an empty string to disable.
*/
"SilentChatTrigger" "/"
Change "SilentChatTrigger" to "!"
and leave "PublicChatTrigger" to empty ""
*edit
And there is one option more, set this "yes"
Code:
/**
* If a say command is a silent chat trigger, and is used by an admin,
* but it does not evaluate to an actual command, it will be displayed
* publicly. This setting allows you to suppress accidental typings.
*
* The default value is "no". A value of "yes" will supress.
*/
"SilentFailSuppress" "no"
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