How do I apply an effect to the entire result of multiple stacked clips in FCPX How can apply an effect to the RESULT of multiple composited clips in Final Cut Pro X? Googling all I see is how to apply the same effect to multiple clips but that's not what I'm trying to do. I'm trying to apply a single effect to the result of compositing multiple clips.

For example, one way would be to render my video without effects. Then start a new project, load the rendered video, apply the effect. It seems like I shouldn't have to render the video and start an entire new project to achieve this.

To give a simple example. Start a new project. Make the project 1280x720p, drop in a iPhone portrait mode video (make sure the project stays 1280x720p), apply the colorize event. Since the colorize event only applies to the clip I get this



But I want it to apply to the entire video (the result of all the clips)



Note I am not try to achieve the effect shown above. I just needed to throw together an example showing the issue (effect applies to clip instead of to entire video).

Is there a way to do it short of rendering out the entire video, starting a new project and applying the effects to the rendered video?
I’m not entirely sure what you explain. However I try. 
Did you look into the option of an adjustment layer?
http://www.fcp.co/final-cut-pro/tutorials/945-how-to-build-and-use-adjustment-layers-in-final-cut-pro-x