Adjust All Times
Shift all subtitle timings by a fixed amount.
- Menu: Synchronization → Adjust all times…

Options
- Adjustment — Time amount to shift
- Show earlier / Show later — Apply the adjustment as a negative or positive shift
- Apply to — All lines, selected lines only, or selected lines and forward
The window remembers its position and stays open across New/Open, so adjustments can be made while continuing to work on the subtitle.
Keyboard shortcuts
- Shift/Ctrl/Alt + Left or Right arrow — Show earlier/later
- Time codes shown as milliseconds: 10 ms / 100 ms / 500 ms
- Time codes shown as frames: 1 frame / 10 frames / 1 second
Note: “Selected lines and forward” applies the shift to the currently selected lines and every line after them.