Font

canvas.node(1).add({
    shape: 'rect',
    size: [30, 30],
    labels: {
        0: { text: 'Custom\nFonts' },
        1: { text: 'Times', font: 'Times' },
        2: { text: 'Courier', font: 'Courier' },
        3: { text: 'Verdana', font: 'Verdana' },
        4: { text: 'Impact', font: 'Impact' }
    }
})