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Two-finger-click, meaning put two fingers on the trackpad and click.
Or go to System Preferences > Trackpad to enable right-click there.
If tapping is enabled there, you can also two-finger tap for right click.

And you can also use CMD+C and CMD+V for copy and paste.


Btw, you can also find many answers to your questions via using a search engine instead of waiting for an answer.


 
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