COLUMNS
Type: $blogExpOpt
Scope: children
Purpose: Children export as columns
Add COLUMNS to a sub-post’s $blogExpOpt to have the children export as columns. BoxPress will adjust the width automatically. Use of more than four columns is discouraged because it looks bad.
Columns are responsive and collapse when the browser window gets narrow. So you may have to widen your window to see the columns effect in the sample export below: