If your goal is to "put together" text with a video (such as subtitles or titles):
If you want to add a text-based chapter list, you can import .xml or .txt chapter files directly in the "Output" tab of MKVToolNix .
Click at the bottom. This combines the parts into a single 1080p file without re-encoding, meaning the process is fast and preserves the original quality. 2. Adding or Editing Text (Subtitles & Metadata)
For permanent text overlays (like titles or watermarks), online editors like Canva allow you to upload MKV files, add text layers, and export them. 3. Quick Video Editing
