A template which will render the content with a maximum of 1 column, independent of the device screen. For print, the number of columns will always be 1.
A template which will render the content with a maximum of 2 columns, depending on the device screen. For print, the number of columns will always be 2.
A template which will render the content with a maximum of 3 columns, depending on the device screen. For print, the number of columns will always be 3.
A template, which is bare minimum without any predefined styling at all.