how to add the "animation: {}" on Sencha Designer 2?

Hi! thanks for your time

In your kitchensink example you have this:

Code:

---

  items: [
                    {
                        text: 'Slide Left',
                        id: 'SlideLeft',
                        view: 'SlideLeft',
                        card: false,
                        animation: {
                            type: 'slide',
                            direction: 'up'
                        }
                        leaf: true
                    }
                ]

---

My question is how to assign the animation.direction in Sencha Designer 2? so far I haven't find it anywhere. Any idea? please