Our team manages everything in Trello. I always, always include annotated screenshots for UI fixes. I’ll use Sketch or Skitch to mark them up and provide context. If the fix is motion or animation-related I’ll include a gif or mp4.

In both instances I’ll show the “current” and “desired” states side by side with highly specific directives that are actionable (this is key): “increase this margin by 8pt.” Or “this element should be vertically centered between these two elements.”

The devs I work with consistently thank me for being painfully specific and including annotated visuals, even for simple fixes. The slight bit of extra time I spend to create more detailed tickets saves a ton of time overall because the engineers have all the detail they need without any further back and forth.