ImTheirWebGuy

Provides the ability to select from the classic 1 or 2 column setup on your dashboard in wp-admin. There are no settings, simply install, activate, and then use “Screen Settings” in the main dashboard view to select one or two columns.

Two Column Admin

Provides the ability to select from the classic 1 or 2 column setup on your dashboard in wp-admin.

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.

Two Column Admin vs Three Column Screen Layout