Years ago, Apple had a software called "Soundtrack Pro" it was one of the best software out there for sound design because of a few key features - one of those features was a HUD that would pop up when you were dragging an event. The HUD had three visual previews, the video frame at the event start position, the video frame at the cursor position and the video frame at the event end position. This would allow you to click a sound effect at the transient, and then drag it to the exact video frame you need knowing that when you let go, the event would be perfectly timed to the visual cue without needing to move the event 500 times to get it into the correct position.