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.