Hide progress cursor

Is it possible to hide the progress cursor in the tasks ?
i want to show the progress but i don’t want to let users to adjust from the gannt view.
I just want to adjust progress in the lightbox.

Yes, it is possible to do that. That feature is controlled by gantt.config.drag_progress config:
If you set it to false, it won’t be possible to change the progress in the chart using the drag knob. Here is an example: