Sorting the table, but NOT every column

Hello,

I own the Ninja Tables Pro Plugin and I can’t quite figure out how to manage that my table is sortable, but not every column. Is there a way to prohibit column 2 and 3 to be sortable, whereas 1 and 4 are.
I found the checkbox to allow/disallow the search function to be specified seperately, unfortunately it seems that I don’t have the possibility to do that with the sort function.

Thank you for your help!