Find Maximum and other suggestions

  1. On other computers you can (also) use Ctrl+Mouse Wheel to rapidly zoom in/out. I presume the same will be available on Macs with Command+Mouse Wheel.
    Similarly Cmd+1, Cmd+2, Cmd+3 will probably give you “zoom in/normal/out” respectively.

  2. On other computers you can use the “Home” button to take you to the beginning of the track. As Macs don’t have a “Home” button I’d guess that there is an alternative key or combination - perhaps Fn+left arrow?

All keyboard shortcuts can be found in “Edit menu > Preferences > Keyboard”. Most of the shortcuts can be customised.

As bgrato suggested, the “PopMute” plug-in is probably the closest effect to what you are doing manually.
An alternative would be to use a “limiter” or “soft clipping” to bring down the peaks to a user defined threshold level. You will probably find a limiter in the LADSPA plug-in pack, or there is a “soft clipping” plug-in near the end of this topic: Peak Limiter / Expander