Why good timing is invisible
When captions are well timed, nobody comments on them. The words appear as they are spoken and the viewer simply understands. When they are off by even a fraction of a second, something feels wrong. Captions that arrive early give the line away; captions that arrive late make the viewer feel they are catching up.
Animated presets make this more obvious, not less. A word that pops in on the beat feels satisfying. The same pop a quarter of a second after the word has been said feels careless, however good the design is.
Fix the starts and ends first
Automatic timing is usually close within a sentence and less reliable at the edges: the first word after a pause, the last word before a cut, and words that follow a laugh or a breath. Play each line and watch the first word. If it lights up before the speaker opens their mouth, nudge it later.
Pay attention to the end of each line as well. Captions that vanish the instant the last word ends can feel abrupt. Letting a line linger briefly into the pause gives the viewer time to finish reading, as long as it clears before the next line starts.
Re-check after every trim
Cutting a pause or a mistake from the middle of a clip shifts everything after it. Check the lines around each cut, because this is where a word may be left behind, duplicated or stretched across the gap.
In Gradian you can split, nudge and retime single words directly on the timeline, and undo anything that goes wrong. Work through the edit in order from the start, so each fix does not disturb the one before it.
Watch at full speed, once, with no sound
Slowing playback down is useful for fixing a single word, but it hides pacing problems. Once the timing looks right, watch the whole clip at normal speed with the sound off. You will notice lines that change too quickly to read and emphasis that lands a beat late.
If a line is too fast to read, split it rather than shrinking the text. Two short lines that each stay on screen long enough will always beat one long line that flashes past.
Try these ideas in Studio.
Try it in Gradian ↗