How to quit or close single simulator from opened multiple simulator in Xcode 9?

Select Simulator.. Go into File Menu -> Close window or press [Command + W ]. It will close the simulator which is on top .

Go into Windows menu -> uncheck Show Device Bezels. Then you can close using red cross icon on simulator.

There are two ways to close particular Simulator form Multiple simulators

1. Long-press power button on the right-top of simulator , then slide to turn off power, a single simulator will be close.

2. Go into File Menu -> Close window or press [Command + W ]. It will close the simulator which is on top

1) Simple way to close single simulator

-> Select required Simulator

-> Click Command + W (⌘W).

2) If you want to minimise simulator

-> Select required simulator

-> Click Command + M (⌘M).

3) For screen shot of simulator

--> Select required simulator

-->Select Commend + S (⌘S).

4) If you want to rotate simulator(for landscape mode)

-> Select required simulator

-> Click Command + left arrow or right arrow.

See below screen for left arrow or right arrow