What security settings should one use with Keychain? I'm a new to Mac and found that Keychain has gathered quite a lot of passwords so far. I'm concerned about the security of these data, and I would like what security settings would you recommend so that my keychain data is secure?
Maximum security if you’re that worried. Otherwise, just enable Lock when sleeping.

I’m not that worried because to view the password in Keychain Items requires your account password.