Show waveforms on just some audio tracks/clips

Hello.

When searching for answers to this question I came across lots of topics where people were asking why only some clips had waveforms and others not. That is obviously a problem but not mine. I have waveforms displayed on all tracks but there are some many clips on the timeline that moving around it takes forever as every scroll or zoom in or out causes the timeline to need to redisplay the waveforms. I could turn the waveforms off by clicking on the wrench at the time of the timeline panel and de-selecting "Show audio waveform", then I can move around the timeline smoothly. However, then I cannot edit so well as I need to see the waveforms but only on one track.

So my question, how can I turn waveforms on or off on individual tracks or clips? Is this possible or is it only a global setting?

Alternatively, some way of premiere not struggling to display waveforms so much. I am on a powerful machine!

Many thanks, Stephen