Create column group with the shortcode, then add columns to the group with the shortcode, like this.
This is my first column This is my second column.
This is my second column This is my third column.
The column will be twice as large as the second or third..
If you'd like your own margins and stuff, dequeue the columns css style during wp enqueue scripts with priority of 11 or more...
Download archive and unzip in wp-content plugins or install via Plugins Add New..
The author of this plugin did not include these.
But in the end this will always look better than pre defined responsive css settings included in some other plugins.
Browse the code, check out SVN repository, or subscribe to the development log by RSS...
Fix wpautop issues when another shortcode appears in column.
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