Click More in the Scene category.
Click on a sample shortcut like Home, Away, Sleep, Dinner Time to edit or click on the + and select Shortcut to add a new one.
For this example, I will select Shortcut to add a new one. Select an image, name and device action.
Here we have created a Happy Holidays Shortcut with my Christmas Tree plugged into my Smart Plug. Of course, you can add more device actions with your other Smart Devices to your liking to create the perfect holiday cheer.