You can do it directly in event data object or using onBeforeEventRender event handler.
Comment posted by Bogdan 11 years ago.
Hello,
Thank you, that solved my question. Besides start, end, id, resource, text, toolTip, backColor, moveVDisabled, moveHDisabled what other properties I can set?
Comment posted by Dan Letecky [DayPilot] 11 years ago.
You can find the list of supported properties here: