TouringPlans.com has a "Room Request" feature that helps you request a great room at Disney-operated hotels at Walt Disney World Resort in Florida. (Note that you must have a Walt Disney World TouringPlans.com subscription that is valid on your check-in date in order to use this tool.)
Although the process is not hard, it involves several steps. You have to create a "trip" on your TouringPlans.com dashboard, define dates for that trip, and select a hotel for that trip, find a desirable room in our Room Finder database, request it, and finally fill out details that will be used in the request that we'll send to Disney on your behalf.
We also have tutorial videos on our YouTube channel. Please see: