Edit > Select > Volume selects all points or polygons that lie within a user-specified bounding box. The bounding box is specified by two points.
First Corner parameters - control the X, Y, and Z coordinates of one corner of a bounding box.
Second Corner parameters - control the X, Y, and Z coordinates of an opposite corner of a bounding box.
OK button - terminates the dialog and maintains the selection for action by another function.
Cancel button - terminates the dialog without selecting points or polygons.