Hi Berezkin,
Thanks for contacting Syncfusion Support.
Query1: How can I move the header node?
The header node will be drawn based on the aggregate of child nodes start and end time values. If you want to manually calculate the header node start and end time, you can set UseAutoUpdateHierachy as false.
Please refer the sample from the following location.
Query2: How can I move multiples the nodes?
Please provide more information or use case on this scenario, which will be helpful to provide a better solution.
Query3: How to move the node in different header node and delete, change or add connector, using a GUI?
Currently we don’t have support for dragging the nodes between the rows and adding predecessor by dragging from the node .So we have considered the requirement as feature. This feature will be implemented in any of our upcoming release.
Regards,
Rachel. A