How switch between line = 0 and line = 'dedicated' in a Event?

The "line" property can't be changed in onBeforeEventRender (that's too late). You need to set it in the data source before the Scheduler loads it.

You can preprocess the data like this:

const events = [ /* ... */ ];
events.forEach(e => e.line = 0);  // or events.forEach(e => e.line = "dedicated");
dp.update({events});

If you use a number it will use the specified line within a row. If you use "dedicated" it will use a special line for each event and if you use null or undefined it will have the default behavior.

"You need to set it in the data source before the Scheduler loads it." Yes, I understand, that's why I was reloaded the data every time I tried to change my mode.

But with your solution it is no longer necessary reload data, just go loopthe same arrayto and change the property.

Thank very much!!!!

Greetings !!!