Hades........ .. .Most FMS have a [DCT TO]push button, just fill in the waypoint name in the brackets, and away you go.If the point you require is already in the flight plan you are using, its usually possible to just push the button next to that point, and the result is the same.If you did delete all the waypoints in the flight plan up to the one you want (very slow), then they are all recoverable as described above.. .Speed limit points are often coded directly into the flight plan, usually where they form part of a SID or STAR, if not pilots can insert them manually.. .Basically the FMS is a highly versatile tool, anything that the database provider doesn't insert into a 'Company Flight Plan'- the pilot can put it in themselves.The only thing that pilots can't alter are 'Database Approaches'.