How can I make texts highlightable in ExtJs?

I’m still finding my way around Extjs, I’m currently displaying text data to a UI like so:

reference: 'agentLogGrid',

    store: {
        xclass: 'Ext.data.ChainedStore',
        source: 'LogViewSource',
    },

    itemConfig: {
        viewModel: true,
    },

    columns: [{
        text: 'Timestamp',
        xtype: 'templatecolumn',
        tpl: '{timestamp}',
        flex: 1,
    }, {
        text: 'Data',
        xtype: 'templatecolumn',
        tpl: '{data}',
        flex: 1,
    }],...

But the texts are not highlightable, that means I can’t highlight them and copy, or select and copy. When I mouse over, the pointer sees it as a link, but I can’t highlight or select. How do I make just the {data} highlightable?