To bring things more in line with the recent style refresh in the Designer, and also to make flexbox a bit more intuitive for everyone, we've made a few changes to the flexbox control UI in the Styles panel.
Setting horizontal and vertical flex direction is usually the first and most important action, so we gave it dedicated space above the distribution and alignment icons. This also frees up some breathing room around the icons so they're easier to understand at a glance.
The more significant changes come when we start looking at the controls for flexbox items. Here's what's different:
We made a few tweaks to flexbox UI in the Styles panel that should make using flexbox simpler and more intuitive.