Default subtitle on Blu ray copy

[Nico83500]

Hi
I make movie only Blu ray copy BD3D to BD25 3D with 1 one audio track and 1 or more subtitle tracks.
I would like to put 1 subtitle track by default to auto play with the movie but I don't find any option to do that.
Is it possible ? How can I make that ?
Thanks !

[terry5]

It has been done in Fab9. Please mark the subtitle as shown below.

[Nico83500]

Thanks ! I'll try this