You will need to add the text manually, something like copy/paste for each part of your subtitle. Thus adding this “filter” a great number of time.
Use this to add text to your Playlist or Timeline as a standalone clip object with its own duration and effects (filters) that affect only the text. Otherwise, when using a text filter on a video or image clip, any additional filters you add also affect the image and not only the text!
This exists in several places:
The main menu at File > New > Text
The main menu at File > Open Other…
The 2nd icon in the main toolbar
[Generate icon]
The 5th icon in the Timeline toolbar with the same icon
[…
IMHO, it’s better, faster, easier, and fully automated by using the “Subtitle: Burn In ” filter for each version of your subtitle. But maybe I misunderstood what do you want exactly…
The Subtitles Burn-In Filter was added in Shotcut 24.08
The Subtitle Burn-In Filter can overlay subtitles that have been authored in the Subtitles Panel . The filter can only be added to the Timeline Output .
After you add the Subtitle Burn-In Filter to the Timeline Output, select the subitle track name from the Subtitle Panel that you want to overlay.
The subtitle overlay text can be configured similar to the Simple:Text filter - including the preview window controls for size and position.
[…