For folks coming from the Drupal world to Backdrop CMS many things are very similar and easy to understand, a few things are quite different. The layout system may be the part of Backdrop that is the most different from Drupal and that requires some time to get used to. It's based very loosely on Panels (in Drupal) but with a prettier and easier to use interface. Despite that, it does take some getting used to.
I've included a link to a 30 minute video introduction that I did for the Backdrop layout system. In this discussion we will talk about the strengths and weaknesses of the layout system, answer your questions about layouts, and demo a few of it's hidden features.
Block A - Slot 2
8am July 9th, UTC -8 (Oakland, Seattle)
10am July 9th, UTC -6 (Chicago, Dallas, Managua)
11am July 9th, UTC -5 (New York, Miama)
Noon July 9th, UTC -3 (Buenos Aires, Brasilia, Santiago)
5pm July 9th, UTC +1 (Berlin, Oslo, Madrid, Johannesburg, Cairo)
6pm July 9th, UTC +2 (Beruit, Athens)
Midnight July 10th, UTC +9 (Tokyo, Seoul)
1am July 10th, UTC +10 (Sydney)