V11 Understanding the "Prevent Container Float" Property on a Container Control
D23 Alpha Five v11 Dialog component container prevent float
(Note: This dialog is aimed at advanced developers) When you use a client-side show/hide expression to show or hide a container, not all of the vertical space consumed by the container is removed when the container is hidden. This dialog explains how the container's "Prevent container float" property can be used to solve this problem (Requires build 3818 or above).