Canon currently uses a full-height column background on layouts with a right sidebar. Unfortunately, these columns are notoriously difficult to implement in a generic way and come with many trade-offs. This is a well-known problem going all the way back to the early 2000s. Once you combine fluid columns, multiple columns, and responsive features, it is pretty much impossible to implement. By including this style in Canon, we impose a lot of necessary restrictions on Canon users. The easiest solution is simply to remove the background styles altogether.
Canon currently uses a full-height column background on layouts with a right sidebar. Unfortunately, these columns are notoriously difficult to implement in a generic way and come with many trade-offs. This is a well-known problem going all the way back to the early 2000s. Once you combine fluid columns, multiple columns, and responsive features, it is pretty much impossible to implement. By including this style in Canon, we impose a lot of necessary restrictions on Canon users. The easiest solution is simply to remove the background styles altogether.