I have three blocks A, B and C on the home page on location Content Bottom. I have another block D I want to place at location A+B and I want to keep C at the same location. I will move A and B to another location on the layout. How to do that? Currently when I place block D at Content Bottom it only takes the space (and width) of block A and other two columns look Odd. Block D now shows up as a single long column. Not a developer, using Drupal for three years, always learning more about Drupal. I know a little bit about css files and css injector.
If I place block D at Tertiary Content location, it takes the whole width of the screen. It shows below the region for A, B and C.