The routes are different when you move blocks from the:
SCHEDULE region to the LOAD region and
UNLOAD region to the PALLET region.
For these routes, you will have to prompt the user to tell you the item ID of the block, so Tracker knows which block to move.
For these buttons:
Create a Mouse Up event.
Create a Variable Setpoint action that will allow a user to type in the item ID of the block.
(In the real world, there would be some sort of bar code reader that would automatically read in the serial/item number.)
Configure a button for the SCHEDULE to LOAD route.
Create a variable setpoint button for the UNLOAD to PALLET route.