Hello,
you can add space below the last event using the fit_events_offset setting of createTimelineView method:
scheduler.createTimelineView({
name: "timeline",
x_unit: "hour",
x_date: "%H",
x_step: 1,
x_size: 24,
fit_events_offset: 15,
here is a working demo:
https://snippet.dhtmlx.com/a3rf4a4s