The ID cell and the loco picture can be dragged to set a loco in a block. If the block was already occupied it will be freed-up first.
Note: With Linux and OSX you can also D&D a loco to a different level. Drop the Loco on the tab of the level and it opens up, then place the loco in the desired block.
If pressing the control+alt keys before dragging will add a block to the trip.
Note: Multiple same block IDs are not supported in a block trip.
Set the destination, or end of block trip, for a train and issue the command "GO".
If pressing the control key, or cmd on Mac keyboards, before dragging it will move a train from one block to the other.
A list of possible schedules will popup if the Finder is active.
After selecting a schedule the train will get a GO command with the schedule.
If pressing the alt key before dragging will set the pass through block to the train.
The train will not go into the idle state after reaching this block.
Since the arrival of Drag&Drop the single left mouse click had to be sacrificed. A double click is needed to start a loco in a block.