Clarifying display of overlapping time constraints and highlighted periods

Question

I tried the following example : 

```
@startuml
concise "Resource 1" as r1

@0
r1 is {-}

@30
r1 is Reservation1

@60
r1 is Reservation2

@65
r1 is Reservation3

@70
r1 is {-}

@r1

highlight 20 to 40 #Cyan : Reservation2 ACK Period
highlight 50 to 70 #Red : Reservation2 ACK Period
highlight 55 to 75 #Gold : Reservation3 ACK Period

r1@20 <-> @40 : "Reservation1 ACK Period"
r1@50 <-> @70 : "Reservation2 ACK Period"
r1@55 <-> @75 : "Reservation3 ACK Period"

@enduml
```

Which right now gives the following :

Because of overlapping, the display isn't clear :
Could we have the time constraints not on the same line when overlapping, and could we have hatched overlapping periods to show the overlapping periods different colors ?

Comments

Hi V., and all,

Awaiting correction, here is a possible workaround, using '\n' and alpha color: 

@startuml
concise "Resource 1" as r1

@0
r1 is {-}

@30
r1 is Reservation1

@60
r1 is Reservation2

@65
r1 is "\n\nReservation3"

@70
r1 is {-}

@r1

highlight 20 to 40 #Cyan : Reservation2 ACK Period
highlight 50 to 70 #ff0000CC : Reservation2 ACK Period
highlight 55 to 75 #FFD700CC : \nReservation3 ACK Period

r1@20 <-> @40 : "Reservation1 ACK Period"
r1@50 <-> @70 : "Reservation2 ACK Period"\n
r1@55 <-> @75 : "Reservation3 ACK Period"

@enduml

Enjoy,
Regards,
Th.