Fix a word.
Move every caption.

1. Start with a blank practice subtitle.

Prefer a fresh tab. If existing work is visible, stop: preserve it through a save-and-reopen route you have personally verified before choosing New. Do not discard a real project to try this guide.

Keep Auto save loaded subtitle off. Once you know there is no work to lose, choose New. The default demonstration video and waveform are unrelated to these fictional captions. There is no need to play them or load media.

2. Create three captions.

Insert three lines. For each row, enter the text and its Show time below. Set Duration to 2,500 (2.500 seconds). Press Enter after each timing field, then verify the subtitle table updates. Check both Show and Hide, not just the value you typed.

These are synthetic reference values, not an exported subtitle file. If the table differs, correct it and verify again before moving on.

3. Correct the word. Delay all three cues.

1. Select the second row and change its text to Add the café heading. Check the accent in the table.
2. Choose Synchronization → Show earlier/later.
3. Replace the offset with 0.5 seconds, then choose Show later once and Done. Check the entered offset rather than accepting the default.
4. Inspect every row. In the observed online operation, all three cues shifted even though only one row was selected. Do not rely on selection to limit this operation.

If the menu or fields differ, stop and compare with the official documentation. Do not repeat Show later blindly: another shift could move the captions again. Undo and reload recovery were not tested.

4. Check start, end and duration independently.

Read the table’s Show and Hide columns, including columns outside a narrow view. Expected final values, in seconds:

Each start and end should be its original value plus 0.500 seconds. The gaps remain 0.500 seconds: 4.500 − 4.000 and 7.500 − 7.000. If any value differs, the check has not passed.

Final self-check: Is café corrected? Did every start and end move by 0.500 seconds? Are all durations still 2.500 seconds? Are both gaps still 0.500 seconds?

This checks the visible practice values only. It does not certify completed learning, subtitle accessibility, audiovisual synchronization or a recoverable file. Do not rely on the open tab as a saved copy.

Try the separate editable video project → Its media and optional captions are a different exercise; this guide does not test importing these lines into it.

What was checked, and what still needs checking.

Evidence boundary: 10 November 2026. The official online UI was used to create these three synthetic cues, correct café and shift every cue by +500 ms. The resulting table’s start/end values were checked.

Not verified: native SRT/WebVTT save, download or reopen; visual/media sync or frame accuracy; undo or reload persistence; a first-time learner walkthrough, assistive-technology checks or the desktop app; and the hosted service’s privacy. Desktop runtime was not tested.

Professional quality control, delivery formats and support can justify a paid editor such as EZTitles. This small exercise establishes no feature parity, compliance or savings claim.

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