Disable dragging in mobile (or small screens)

Is there a way to disable dragging on the map in mobile?
Or at least on small screens? ( <768 ).

I'm no programmer, but I can follow some directions.
I found out that it is possible to disable it via options:
map.setOptions({draggable: false});
But I don't know how to use it, if there is a listener, or I should create one.

Can you help me?
I'm on J2.5 with ZH GM version 5.6.10.

Thank you

Hi

You can disable map dragging at all. It is in map details.

Disable for specific devises, or for screen resolution you can't do it.