By default, the LaneResizeType property is exLaneResizeProportionally, so the the lanes get proportionally resized, when the user resizes the pool. The LaneResizeType property specifies how the pool resizes the lanes, once the user resizes the pool ( valid for all pools ). The LaneResizeType property specifies how the pool resizes the lanes, once the user resizes the pool ( valid for a specific pool ). Use the AllowResizePool property to specify whether the pool can be resized at runtime.

The following screen shot shows the pool before resizing it:

The following screen shot shows the pool resized while the LaneResizeType property is exLaneResizeProportionally ( by default ):

The following screen shot shows the pool resized while the LaneResizeType property is exLaneResizeLast: