One column
Full-width rich text
This is a single-column row. Its left and right edges should line up exactly with the outer edges of the two-column row below it, because every section uses the same page container.
Left column text. Its left edge matches the one-column row above, and the image's right edge matches that row's right edge.
- asdf
- asdf
- asdff
- asdf
- afsd
Three columns
Three equal columns. The images on either side use a Square shape via the new image-dimension control.