I am new here and I want to mention position to show an item.

my code is
var viewport = new Ext.Viewport({
layout:'border',
items:[{
xtype:'portal',
region:'center',
margins:'40 5 5 0',
items:[{
columnWidth:.33,
style:'padding:10px 0 10px 10px',
items:[{
title: 'Grid in a Portlet',
layout:'fit',

//items: new SampleGrid([0, 2, 3])
},{
title: 'Another Panel 1',

// html: Ext.example.shortBogusMarkup
}]
},{
columnWidth:.33,
style:'padding:10px 0 10px 10px',
items:[{
title: 'Panel 2',

//html: Ext.example.shortBogusMarkup
},{
title: 'Another Panel 2',

//html: Ext.example.shortBogusMarkup
}]
},{
columnWidth:.33,
style:'padding:10px',
items:[{
title: 'Panel 3',

//html: Ext.example.shortBogusMarkup
},{
title: 'Another Panel 3',

// html: Ext.example.shortBogusMarkup
}]
}]

/*
* Uncomment this block to test handling of the drop event. You could use this
* to save portlet position state for example. The event arg e is the custom
* event defined in Ext.ux.Portal.DropZone.
*/
,listeners: {
'drop': function(e){
Ext.Msg.alert('Portlet Dropped', e.panel.title + '<br />Column: ' +
e.columnIndex + '<br />Position: ' + e.position);
}
}
}],
renderTo: 'CProfilePanel'
});

For example how I can show 'Panel 3' in the end of first column.