Frequently asked questions from reviewers

Can I change my recommendation after I submit my review?
How will I be informed of the decision on a paper that I have reviewed?
How to I get a different type of file to review? I have problems reading a PDF file.
What if I must have either a student or a colleague complete the review on my behalf?
How do I obtain official documentation of my contribution as a reviewer? (i.e. for a year-end review, a degree, etc.)
Can I have my name revealed to the author(s) of a paper I review so that they can contact me if they need clarification?
My area of expertise will soon change and I can no longer serve as a reviewer for a particular publication. How do I communicate this?
How long will a review I submitted remain in the reviewer center?