Some third-party professional title software (such as Newlue Titler Pro) supports NDI output, we can use it as a NDI source .

1. Run the third-party professional subtitle software and  open NDI output.

2. Add NDI source to waitting area.

3. Overlay NDI source to PGM

     Click the "+" icon on NDI source window, and the titile will be overlayed on PGM.