Android with real keyboard - Keyboard Layout/Buttons?

Hey there,

I am using a Galaxy S7 (SM-G930F) from Samsung and Android 6.0.1.

I use it with different keyboards (mostly Microsoft keyboards, wired/wireless with the USB Connector) and wanted to know more about the keyboard layout or which button on the keyboard does what on the actual phone (?).

For example: How to press the "Back"-Button -> Press ESC.

Is there a reference or other resources available?
I'm okay if it is more technical or programming stuff.
Any help appreciated

Particularly: How do I swipe down resp. activate the little menu when you pull down from the top on the phone (I guess it's called "push notification dashboard" (?) or something alike).

P.S: I hope this is the right place since it is not really a question about the phone itself, more Android related (I guess) I did not understand what "red" or "green" meant.

Greetings, Countryen.

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Android with real keyboard - Keyboard Layout/Buttons?