This is little idea about sweeping,
1. Sweep left to right, then release it, your object will fade in and out with this action.
2. Sweep from left to right then push it down,it'll stuck & the object will fade in and stay still.
3. Push it top, then release it, it will go back and your object will fade out.
keyboard shortcuts: ← previous shot → next shot L or F like Z toggle zoom