Specifies the vertical position of the layer relative to the background image (layer 0). PosYD provides a double version of PosY if you need more accuracy.
These constants are also supported:
Const
Description
IELayer_Pos_Top
Adjust PosY so layer is aligned to the top of the background layer
IELayer_Pos_VCenter
Adjust PosY so layer is aligned to the vertical center of the background layer
IELayer_Pos_Bottom
Adjust PosY so layer is aligned to the bottom of the background layer