Right now if I want to findout where keyframe 0:18 is in seconds, I have to open up a calculator and take 18 divided by whatever the FPS of this animation is running (and it’s not always 30).
In this example I’m running 30 FPS, so at frame 18, im 18/30 = .6 seconds into the animation.
This is a very tedious way of finding the most basic of information.
Therefore I suggest that when you hover over a keyframe, it will display the time as shown below:
Just so you know, you can click the gear button on the top right of the editor, then select Time Unit -> Seconds. This will change the timeline to be in Seconds rather than Seconds:Frames.