Stretch actions move and stretch objects a specified distance in a specified direction relative to the base point specified by the action.
A stretch action applied to a point parameter moves and stretches selected objects a specified distance in any direction.
A stretch action applied to a linear or polar parameter moves and stretches selected objects a specified distance in the direction of the parameter.
A stretch action applied to an XY parameter stretches the selected objects only in the X and Y direction specified by the parameter.