I'd like to change the galleries I've just set up from 3 columns to 4 columns wide.
When I go into the gallery page then select the gallery to edit I can change the image order etc. but I don't see where I can change the number of columns (as shown in the WP Support gallery section). Please could someone tell me (in simple terms!) how it's done.
The blog I need help with is noelinesmith.wordpress.com.