Directional pickwave grouped by Item will display all items to be picked from a specific BinRack, where each step represents a single BinRack. The pickwave will be naturally sorted by the routing sequence of binrack (applicable to WMS enabled location). 

Directional pickwave grouped by Order will display one order per step. Single item orders will appear towards the start of the pick, followed by multi-item orders. Multi-item orders routing sequence will be worked out based on the average routing sequence of BinRacks where items to fulfill the order can be found. 

See Also: 

Generate a pickwave, and pick using mobile app

Directional pickwave
Directional pickwave - Force BinRack scan (WMS only)

Directional pickwave - Force Item scan

Directional pickwave - Show one item to pick per step