Combine both Thumbs Width and Gutter (spacing between thumbnails) to achieve the desired layout. The sum of all columns plus inner gutters must be 100%. You may use some of the formulas below:
- Two columns with 2% gutter set the Thumbs Width to 48%
- Three columns with 1% gutter set the Thumbs Width to 32%
- Four columns with 2% gutter set the Thumbs Width to 23%
Set the desired breakpoint so the layout will be reduced to one column. By default this is set to 640 pixels, which is the UIkit-3 small breakpoint.