Number of rows in RT3.6.3

Hi,

I would like to take some of your time to inquire about the following
matter: I am using RT 3.6.3 and I would like to know what sets the
number of rows to be displayed in the tickets to be 10. In RT.3.2.1, it
was variable that was located in RT_Config.pm. But, when I look at
"initialdata" in /etc, I see that there is a predefined search as
follows:

@Attributes = (

{ Name => 'Search - My Tickets',

  Description => '[_1] highest priority tickets I own', # loc

  Content     =>

  { Format => "'<a

href=“WebPath/Ticket/Display.html?id=id”>id/TITLE:#’,
’<a
href=“WebPath/Ticket/Display.html?id=id”>Subject/TITLE
:Subject’, Priority, QueueName, ExtendedStatus",

    Query   => " Owner = '__CurrentUser__' AND ( Status = 'new' OR

Status = ‘open’)",

    OrderBy => 'Priority',

    Order   => 'DESC' },

},

{ Name => 'Search - Unowned Tickets',

  Description => '[_1] newest unowned tickets', # loc

  Content     =>

‘Take’ #loc

  { Format => "'<a

href=“WebPath/Ticket/Display.html?id=id”>id/TITLE:#’,
’<a
href=“WebPath/Ticket/Display.html?id=id”>Subject/TITLE
:Subject’, QueueName, ExtendedStatus, CreatedRelative, '<A
HREF=“WebPath/Ticket/Display.html?Action=Take&id=id”>loc(Tak
e)
/TITLE: ’ ",

    Query   => " Owner = 'Nobody' AND ( Status = 'new' OR Status =

‘open’)",

    OrderBy => 'Created',

    Order   => 'DESC' },

My question is what defines the number of rows in ‘[_1] newest unowned
tickets’? Where does the [_1] gets its value from? And, I am a bit new
to perl, but what does [_1] stand for?

Thanks for the help

Firas