Collapsible Columns

Hi all,

I'm just wondering if someone could possibly help me in setting up the following:

I have come across the option to collapse numerous columns at the header of you're worksheet (if you are unable to follow my explanation - please see attached screenshot showing the functionality I'm referring to). This allows you to collapse however many columns into the final column.

Could some please help me in terms of how to find this and implement.

Many thanks

Oliver