If your route uses separate tickets, show the journey as the sequence you actually intend to travel and make the hand-off between flights easy to understand. A reservation for one leg does not automatically document the other leg, and a self-transfer is not the same as a protected connection on one through-ticket. Before you prepare the file, map every flight, airport, date and transfer requirement.
What separate tickets change
Imagine travelling from Istanbul to Dubai, then buying a separate ticket from Dubai to Bangkok. The first airline may treat Dubai as the end of its journey. The second airline may require you to check in again, and your bags may not be transferred automatically. Your documents should not make it look as though the airlines have issued one continuous itinerary if they have not.
A through-ticket generally places the connecting segments in one booking arrangement, subject to its conditions. With separate tickets, you may have two booking references, separate check-in deadlines and different baggage rules. If the first flight is delayed, the second airline may treat you as a passenger who missed a separate departure rather than rebooking you automatically.
Emirates explains that passengers who did not book all connecting flights together at Dubai may need to clear immigration, collect baggage and check in again. Its guidance also notes that baggage arrangements depend on the itinerary. These details matter when you are deciding whether the route is realistic, not just when you are formatting a PDF.