You can specify to add loads to a wave in Wave Selection (4.15.3). Truck load (TL) or less than truck load (LTL) load types can belong to only one wave. For parcel shipping (PS) type loads, the load can belong to different waves, but the load lines belong to one wave.

See Load Type.

You can use function keys in the Wave Selection frame to add loads to the current wave selection, display load summary data, or view line details. Also, the Order Line Detail frame in Wave Selection displays which lines are included in a load. You can select a load in the frame and view additional load details or deselect the load.

See Wave Planning.