I know how to turn a task into a milestone task or create a new milestone task. Now what if I want to convert the milestone tasks with the current milestone marked by a highlighted vertical line, like the start time, end time vertical line? Is that possible?
Support Forum
Yes, should be quite easy to solve - if you add a TimeRange with the same date (and you have to manage syncing its date yourself too).
Docs: https://bryntum.com/docs/scheduler/api/Scheduler/feature/TimeRanges
Demo: https://bryntum.com/examples/gantt/timeranges
Hope this helps 