Reset sort icon

Dear
I want click a button to reset sort and sort icon,I have to try "gantt.sort(null,false) to reset sort,but nothing happen…so,Pls help how can i get it.
Thank you

Hello,
When you use the sort method, Gantt reorders vertical task position. It doesn’t save the previous or initial position. The dev team will add that feature in the future, but I cannot give you any ETA.

Here is an example of how it might be implemented in the current Gantt version:
https://snippet.dhtmlx.com/fbd3d4079