No tutorial needed.
In Surveyor, go to one of your stations. Open the scenery/splines tab, and click on the "?" button in the lower right corner. Now click on your station, and a window will open. Within that window you will be able to change the name of the station and/or platform. NOTE: If the station you have set in place is not a complete item (meaning the building and platform are separate objects) you will want to name the platform. If you just name the building, it won't appear as a destination on the "Navigate to..." list.