By default, the AllowMoveSurface property is exLeftClick, which means you can scroll or move the surface by clicking the left mouse button and drag it to a new position. The AllowMoveSurface property specifies the combination of keys that allows the user to move the surface. The AllowZoomSurface property specifies whether the user can zoom the surface. The AllowZoomWheelSurface property specifies whether the surface is zooming when the user rotates the mouse wheel. The AllowMoveElement property specifies whether the user move the objects as soon as clicking the element. The control's ScrollPos, ScrollX and ScrollY properties specify the surface's scroll position. The control fires the LayoutStartChanging(exSurfaceMove) / LayoutEndChanging(exSurfaceMove) event when the user moves the surface to a new position.