documentation of API functions in Solidity

Question

I would like to find some URL (or something), for the documentation of API functions in Solidity.

For instance: where can I get the information for the Solidity "CALL" function? and know what parameters it uses and how:

msg.sender.call{value: x}("");

Or another example, information for this API:

abi.encodeWithSignature

I know some place like docs.soliditylang.org but I am unable to find the API information.

Thanks a lot.