There are of different way to do subtitles time-coding.
- For precision timing, you can use separate hotkeys for IN and OUT (by default it's Alt+home and Alt+end, you can change them in Settings - Hotkeys).
- A quicker but less accurate way is using timecode mode (Timecode menu - Timecode mode - F10 in default hotkey schema). Hold-down 'Numpad Enter' key to set IN and OUT (press for IN, release for OUT)
- In Pro apps, you can also click and drag the cursor on the timeline to time the subtitle in focus