For all help and discussion relating to visual effects in programs that are not already covered in an existing forum, such as Blender, Particle Illusion, etc., along with discussion about effects theories and techniques.
You may use as many effects on a single track or video clip in Sony Vegas including repeating the same ones as you like.
Note that if you include more effects, it will naturally require a lengthier rendering time to process these effects.
*edit Say, for example, you have a number of tracks and you want to add an effect over multiple tracks at once and edit them all... As far as I know, you must add individually or render project and add to the single rendered video track.
lol just drag the effect to each track, easy enough. Yes the track is the entire row and by adding the effect to the begginning place where it says "here" you have added the effect to every single clip on that track.