Milestones marks

Is there a way I can set a milestone mark with a note or just a name.
I am using GanttProject for managing my students teaching experiences as trainees, and I need to see when they had emailed me their working plans, relative to the whole extension of their tasks.

Thanks very much. Regards.

I don’t quite understand the question. You can convert any task to milestone by checking “milestone” checkbox in the task options. Is it what you’re looking for?

Yep, that’s it. I had paid no attention to the checkbox and I was expecting to make a mark to a specific task line, but essencially it’s what I am looking for.

Thanks for the quick answer, Dmitry.