grnesmith

This Plugin adds the ability to change the vertical screen columns on the admin dashboard. To make a change to the amount of columns displayed click the screen options drop down and select the number of columns under screen layout.

Admin Column View Selector

This Plugin adds the ability to change the columns on the admin Dashboard screen.

Code96

This plugin easily integrates Genesis column classes into your WordPress editor. With the click of a button, you can now add column class shortcodes to your page or post. You will no longer have to know any HTML or CSS. Use the power of the built in Genesis column classes, with the simple click of a button.
Includes 2, 3, 4, 5, and 6 column classes.
Not a Genesis User, I have included the necessary CSS within the plugin. You can activate the optional CSS via Settings > Easy Columns or simply copy/paste into your themes style.css.
Code 96 offers <a href="http://www.code96wd.com" rel="nofollow ugc">WordPress Design</a> services and custom <a href="http://www.code96wd.com/premium-wordpress-themes/" rel="nofollow ugc">WordPress Themes</a>.

Genesis Easy Columns

Easily add Genesis column shortcodes to your WordPress editor.

Admin Column View Selector vs Genesis Easy Columns