Using an Adjustment Layer - Adobe Premiere Pro CC
A quick visual demonstration on how to create an adjustment layer to affect all clips of a project with the same effects.
1.) Create a new Adjustment Layer item in the Project pane.
2.) Add a new track to the timeline above all the other footage.
3.) Drop in Adjustment Layer object to the track and stretch over entire project.
4.) Add effect controls to this new object to apply them over everything at once.