How to check the log when Trigger is turned On and Off

use tempdb;
go
create table dbo.t ( i int not null );
go
create trigger ins_t on dbo.t after insert
as
begin
return;
end;
go
create trigger DdlTrigg on database
after alter_table
as
begin
    declare @e xml = eventdata();
    select n.t.value('Name[1]', 'nvarchar(260)') as disabled_trigger
     from @e.nodes('/EVENT_INSTANCE/AlterTableActionList/Disable/Triggers[1]') as n(t)
    select n.t.value('Name[1]', 'nvarchar(260)') as enabled_trigger
     from @e.nodes('/EVENT_INSTANCE/AlterTableActionList/Enable/Triggers[1]') as n(t)
    return;
end;
go

-- Try disabling trigger on some tables:
alter table dbo.t disable trigger ins_t;
alter table dbo.t enable trigger ins_t;
go
drop table dbo.t;
drop trigger DdlTrigg on database;
go