U don't have any option to do that, i think the only thing u can do is choosing the height, the width it's calculated by the height u put in "Row Height" field the module/component configuration.
Ahh OK. That must be why another install of it shows 3 or 4 wide. Is this a possible addition to the component or module? The ability (at least in desktop viewing) to specify a number of thumbnails per row.
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