How to hide 'Pos', 'Lck' and 'Class Path' column in 'Select a Classification' pop-up screen when a user click Technical Class in Part?

Hi community, 

In Part, when we click 'Technical Class', 'Select a Classification' pop-screen is shown as below:

We try to hide 'Pos', 'Lck' and 'Class Path' column in that screen and try to show the description of Item Class. 

Would you please help how to do this?

Thank you for your help in advance. 

Joseph