ZCA Bootstrap 4 Template [Support Thread]

[lat9]

I'd like to force the listing pages to use larger product images/fewer columns - I know that Product Listing > Columns per Row is recommended to be 0; is there another option?

With that setting at 0, edit your template's override of /includes/modules/bootstrap/product_listing.php, finding the following section

        // set css classes for "row" wrapper, to allow for fluid grouping of cells based on viewport
        // these defaults are based on Bootstrap4, but can be customized to suit your own framework
        if ($product_listing_layout_style === 'fluid') {
            $grid_cards_classes = 'row-cols-1 row-cols-md-2 row-cols-lg-2 row-cols-xl-3';
            // this array is intentionally in reverse order, with largest index first
            $grid_classes_matrix = [
                '10' => 'row-cols-1 row-cols-md-2 row-cols-lg-4 row-cols-xl-5',
                '9' => 'row-cols-1 row-cols-md-3 row-cols-lg-4 row-cols-xl-5',      //-lat9: Added for 3/9/0 configuration
                '8' => 'row-cols-1 row-cols-md-2 row-cols-lg-3 row-cols-xl-4',
                '6' => 'row-cols-1 row-cols-md-2 row-cols-lg-2 row-cols-xl-3',
            ];
            // determine classes to use based on number of grid-columns used by "center" column
            if (isset($center_column_width)) {
                foreach ($grid_classes_matrix as $width => $classes) {
                    if ($center_column_width >= $width) {
                        $grid_cards_classes = $classes;
                        break;
                    }
                }
            }
            $list_box_contents[$rows]['params'] = 'class="row ' . $grid_cards_classes . ' text-center"';
        }

... and edit that grid_classes_matrix for your customizations.