Qlik Sense Map: Line layer with multiple points

[Yves83]

Hello,

I have a list of itineraries between cities, and I would like to trace line layers corresponding to the itinerary selected.

For example AAA-BBB, BBB-CCC, CCC-DDD, DDD-AAA

It is easy to display 1 line layer, AAA-BBB for example, but how can I display all layers of the round trip in one shot ?

Many thanks.

Yves