How to shrink a notification in notification bar in Android Lollipop? I was used to shrinking and enlarging notifications for more buttons in former android version - Kitkat. Now with Lollipop I am unsure how to execute this. I want to shrink notificaitons with buttons if I do not want to use them (i used to be able to do it). 

Formerly I did it by holding notification for a sec and then pulling it down to enlarge or up to shrink. It seems like it works down to enlarge but I cannot shrink. Is there a different way to do it? Or does Android decide when to make it large or small (if yes that is a sad thing)
You can shrink a notification by pinching in horizontally on the notification. Likewise, you can expand one by pinching out horizontally. You can see this in my beautifully-drawn diagram:



EDIT: You can also swipe up/down using two fingers instead of one. Thanks to eldarerathis for this addition.