Creating a session to an SFTP server with a private key

Hello,

So I'm trying to create a session to a SFTP server with our private key but I don't see the option:
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Apparently in previous version there was a field where we could put the key. I've got multiple example of this but I cannot find it in the current version.
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If someone could post a link to a tutorial explaining where I should put this information.

Thanks.

Please read documentation:
https://winscp.net/eng/docs/ui_login_authentication

If that does not help, come back.

Thanks for your help!