Moved from https://github.com/backdrop/backdrop-issues/issues/1399#issuecomment-204...
As per @jenlampton's comment, this might be too hasty to implement in 1.x and should be better of for 2.x. Not setting the milestone right away. Waiting for more input.
...final step: move the admin pages for modules, themes and layouts as primary tabs of the same "Extend Backdrop" page:
GitHub Issue #:
1780
Recent comments
A simple way — use Field Group to create a container for fields https://backdropcms.org/project/field_group and CSS Flex оr Grid to alignment.
Layout also for /node/add/ forms?
Yes. The are several ways to do this: Install Mail System and select "Testing" for delivery in admin/config/system/mailsystem Install Maillog / Mail developer...
Prevent Backdrop from sending emails
The short answer is no, you can't theme forms or change their layouts through the UI. There is a ported version of Display Suite, which has a submodule called Display Suite Forms that allows you...
Layout also for /node/add/ forms?