Can support network diagram?

https://yb.countrygarden.com.cn/docrest/file/downloadfile/1b7023e92b2f6b65974d388b?big

Hello,
There is no built-in feature for that.

However, there is a way to display custom overlay in the timeline and show any HTML elements there:
https://docs.dhtmlx.com/gantt/desktop__baselines.html#extraoverlayforthechart
You can try implementing a custom solution or use a 3rd party library to show the network chart.

http://snippet.dhtmlx.com/c3c6b8276

If you want us to implement it for you, you can contact the Sales team:
info@dhtmlx.com