Shortcut to Zoom Timeline (CMD + Scroll, Pinch to Zoom, CMD +/-)

I'd like it to be easier to zoom in and out of the timeline. Some ways to change the zoom level could be:

• Pinch to Zoom on the timeline with trackpad

• CMD + Scroll on the timeline

• CMD and +/- to zoom adjust the timeline zoom level

This makes the editing experience a lot easier instead of having to adjust the zoom with the slider.