Change blog columns from 3 to 2

Hi,

The website page at  www.historicwinton.org/competitors shows two category-blog items (Groups and Classes, and Car Entries) in a 3-column layout. There used to be a third blog item and I have had to delete it. How do I change the blog layout to 2-column? 

I can see this: class="com-content-category-blog__items blog-items  columns-3"
When I use Inspect to change this to class="com-content-category-blog__items blog-items  columns-2" I get a perfect layout until I refresh the page and it reverts to 3 columns. How might I make this change permanent?

Many thanks,
Julia.

Hello,

You should edit the Blog menu item and under Blog Layout change the number of columns.

Regards,
Milos

Got it. Thanks Milos for your patience.
Julia.