Containers have three different width options to suit every situation. The options are narrow, normal, and full. Each container type can have a different amount of columns inside it.
Editing the container width
Container width can be changed from the container menu in the top-right corner of the container.
Columns in different size containers
Narrow: Maximum of three columns
Normal: Maximum of five columns
Full: Maximum of seven columns
Columns can be added, removed, and resized in edit page mode. If you have too many columns for a certain container width, you cannot apply that container width until you have deleted enough columns to fit the maximum amount of columns for that container width.
For example, if you have a normal container with four columns, you cannot change the container's width to narrow until you have deleted at least one column.