In Drupal 7 I would use Display Suites to create custom layouts for display modes. For example I could create a teaser with two columns and place fields in whichever column I wanted.
I am pretty sure that this is possible in BackdropCMS, but I can not figure out how to do it. I am not sure if it can be done with Backdrop core or if it involves a contrib module? Or maybe, it is not possible at all without a custom template?
Can anyone point me in the right direction?