how can I review the function documentation in PyCharm?

This might be a very basic question but I still cannot find a good solution, I always want to check the documentation for a function of Python to see how to use it and what parameters are inside, however, if I try to click on the search bottom, I can see a more complicated result, instead, I can only search online for these Python function's documentation....it's low efficient

I am pretty sure that there must be a way in PyCharm to view the function documentation, but after searchig online for a long time, I still cannot figure how how to do it T_T

Anybody can give a hint or guide to make it? Thx

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