First, add subtitles.
Open the love clip on the computer and import the video. Double-click the video preview area on the right under the Subtitle Special Effects panel, and then enter text in the pop-up box.
In the list of special effects on the left, check the subtitle special effects. Modify font, size, color, duration of special effects, etc. It's on the right.
Second, quickly add subtitles
Select the prepared subtitle, right-click the copied object (shortcut key: Ctrl+C), locate to a new time point, right-click the pasted object (shortcut key: Ctrl+V), and double-click the subtitle to modify the content.