With SSL certificates stored in keychains, one used to be able to double-click them (or Cmd-I, or click the Get Info button) to bring up a certificate info window. One very common use for this window was changing certificate trust settings. I cannot bring up the certificate info window anymore, through neither of the above methods. I've sent feedback to Apple, but I'm wondering whether others are seeing the same issue? I'm on build 17C85a now (10.13.2 Beta 6), but I'm not sure for how long this has been broken. It may or may not be beta specific.