User blog comment:Rupert Giles/Introducing Curated Main Pages/@comment-24473195-20150910172406/@comment-11733175-20150911091801

Rupert Giles wrote:

You can zoom in/out on desktop using a scroll wheel. On mobile it's pinch to zoom. An early version of this had an actual bar that was used to control the zoom and we may choose to finish that work. That's all well and good for desktop and mobile users, but how are laptop users who may not have a mouse attached meant to figure out that scrolling is how you operate the zoom? It's not a common thing to try in my experience. To use the notifications dropdown in the global nav as an example, I actually reported a bug purely because I couldn't figure out how to move down the list. I've never found it intuitive and certainly not good UX.