If you don’t want to mess with keyframes and apply the FX to the whole project (or event, track, etc) turn off the sync cursor which is at the bottom FX dialog and looks like a big letter I and a lock. Then, you have to close and reopen the FX dialog to make the setting “stick” (yes, this is a bug). Now when you apply changes, they apply to the whole keyframe timeline.
Gary Kleiner
Learn Vegas and DVD Architect
http://www.VegasTrainingAndTools.com