Chad Hovell

Select extra layouts from the post editor Screen Options menu. 
There are now 24 variations to choose from!

Three Column Screen Layout

Three, four and five column screen layouts for the post editor.

veradeveloper

With “Bootstrap’s Columns Controller” you can easily use colums to customize your content
Documentation
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To insert columns to the post/page, go to your post/page and click the button above the WP editor “Add Columns”. After that, choose columns type and click “Save”.
</li>
<li>
In editor you can easily insert the content into the columns.
</li>
<li>
You can remove the row click the button in the editor “Remove the row”.
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</ol>

Bootstrap's Columns Controller

Very cool

With "Bootstrap's Columns Controller" you can easily use colums to customize your content

Three Column Screen Layout vs Bootstrap's Columns Controller