A keyboard shortcut to comment/uncomment the select text in Android Studio

Question

How do I comment out several lines of text selected in the IDE with a control key combination?

I thought that Ctrl + Alt + C was the cor

Answer 1

MAC QWERTY (US- keyboard layout) without numpad:

Line comment : ⌘ + /
Block comment: ⌘ + ⌥ + /

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MAC QWERTZ (e.g. German keyboard layout):

Android Studio Version ≥ 3.2:
Line comment : ⌘ + Numpad /
Block comment: ⌘ + ⌥ + Numpad /

thx @Manuel

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Android Studio Version ≤ 3.0:
Line comment : ⌘ + -
Block comment: ⌘ + Shift + -