Here's the steps I would recommend:
JOB/PCB Add Routs and Mouse-Bites (Repeat for each PCB):
Important: You could also add "fiducials" to the board, by going to menu: Fabrication / Add Fiducials..., along with any other editing like remove borders, trim silkscreen, etc. Please remember with FAB 3000 you can always go back anytime later and make any edits (even after the panel is finalized).
I'm not sure how many of each PCB you require or what panel size, so I just added "random values for the quantity".
That's it, now you're ready to export the entire panel to Gerber, Drill, Rout, ODB++, DXF, etc.
Here's a movie tutorial showing these steps: