There's a
very easy way to use Tony's excellent method across an entire project.
Once you have the opacity settings the way you want them on a single clip, you can right-click and choose
Copy Keyframe Attributes. For your next clip, copy it and place it on the track above, then simply right click on the lower one and choose
Paste Keyframe Attributes.
Note that the clip copy and attribute copy use different "clipboards" so they won't interfere with each other
If even doing that clip by clip that is too much work, then place all of your original clips first, then copy the entire section and paste it in the upper track. Once you copy the original clip's opacity keyframe attributes, highlight the remaining lower track clips and paste them.
Boom - you're done!
YouTube/optodata
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