Hi Cemil,
Greetings from Syncfusion support.
We have validated your reported query “Drag and drop vertically at timeline” at our end. Based on your query we suspect that your requirement is performing vertical drag and drop operation between appointments of a single resource or a timeline view without a resource. and we regret to let you know this is not feasible with our current schedule architecture.
Please let us know if you need any further assistance.
Regards,
Ravikumar Venkatesan