Hi Nicolas,
I think I may have set up my website incorrectly, as I can't get access to anything with an ID of 98.
From my main menu I have Categories Listing item (ID 123) called 'Select your Prints', which yes I can change the number of columns.
However this page needs to stay at 3.
From 'Select your Prints' the user can pick one of three items (each containing 4 products), say they pick '594mm x 420mm' (ID 98 perhaps?), and it is this page I want to change to 3 columns from 4, but there seems no option to do this.
Thanks.