One column
Full width column
Two columns
Left column, 50%
Right column, 50%
Nested Main with Sidebar
Main Column
Main column, 75%
Sub-column 1
Sub-column 2
Sub-column 3
Sidebar
Sidebar, 25%
Three columns
Left column, 2 wide
Middle column, 7 wide
Right column, 3 wide
Four columns
Column 1, 2 wide
Column 2, 3 wide
Column 3, 3 wide
Column 4, 3 wide