Question [Q] Folder Animations

I have just started using Nova Launcher on my old Nexus 7. I made a folder for my games on my home screen and I wanted the contents to do something when I pressed on the folder, for example, fan out across the screen. I've seen this done before but I don't know what it's called or whether Nova can do this. Or maybe there's a separate app that does it. Can anyone point me in the right direction?

Many thanks.

Si