By default, the AllowResizePoolHeader property is exLeftClick, which indicates that with a simple click on the border of the pool's header, the user can resize the pool's header. Use the AllowResizePoolHeader property to specify whether the pool's header can be resized at runtime.  Use the AllowResizePool property to specify whether the pool can be resized at runtime. Set the AllowResizePoolHeader property on exDisallow, to prevent user to resize any pool's header in the surface. The control fires the LayoutStartChanging(exResizePoolHeader) / LayoutEndChanging(exResizePoolHeader) event when the user resizes the object. The LaneResizeType property specifies the way the lanes get resized, when its parent/pool gets resized.