I want to remove all these high waveform (there are about 8 in this 5 minutes track, which I bookmarked), because if I select all > effect > Amplify, It only amplify about 3.2 db, but if I exclude those high waveform, I'd be able to Amplify about 5.6, which is what I'm trying to achieve to the whole 5 minutes track.

Just a comparison of high waveform excluded vs included.

I'm working on a 1 hour track that contains about a hundred of high waveform. I think removing them one by one is not a good idea.