A qualified review cannot be generality restricted to answering questions in a standard form, and many reviewers feel that they can best express their assessment of the submitted article by writing a free-text memorandum.
Please prepare the review in such a way that it can be forwarded to the author (s) as feedback. Any further comments intended exclusively for the editor should be prepared as an additional attachment or in a separate email message. Also, if you prepare your review, e.g. in pdf, you may wish to make sure that the parameters of that document do not unintentionally divulge your identity or affiliation.