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Full-width at one level does not automatically cascade up or down your component tree. It’s more fine-grained than that. And that can result in surprises. For me, the best approach is to view, and experiment, at multiple levels, starting from the top down.
Below, for example, I’d look at “Full Width” of the root-level object, self
(the Form); then the level-2 objects flow_panel_1
and lp_gwb_paramters
; then the level-3 objects…
In each object, try toggling the “Full Width” from OFF to ON, and see what happens. This should give you a feel for how they interact on multiple levels.
Edit: Also see