how to I see existing trade routes?

[Eztrelle]

As the title? I have units that get bonuses for plundering trade routes... but how do I see them???

[Flash]

The same merchant icon tag u have on the initial unit is observable on units on the map. Once a trade route is established, these units go back and forth forever between these cities (unless war etc. some issue interrupts them)

Just see the map for these little units and go loot them for their lunch money. No other way about it right now

[PopaStern]

Yeah there's no proper trade interface unfortunately. It's guessing work for which one you already established and also for how many trade routes you have avail per single civ.

[DadouXIII]

You can't yet :^)
Another UI problem that needs to be handled.

[azmundai]

If you select an unassigned trader unit it will highlight destinations. Green for routes you can connect, red for ones you can’t, and they will be unhighlighted if it is already connected.

[Crim]

Make an extra trader <- Immediate Answer
Complain about bad UI <- Necessary inclusion
Use a Mod from CivFanatics <-- Practical Solution