> ⌘cmd-clicking or alt-dragging, which is super useful to change multiple aligned lines

As you may well be aware, `webp` is not supported in every browser. Please use this technique instead: https://www.joshwcomeau.com/performance/embracing-modern-image-formats/

Or consider using TinyPNG (https://tinypng.com/) to shrink image attachments…

It appears that double-clicking only works if you're clicking a bit to the left of the + sign.