OnePager supports both timeline and Gantt chart layouts.
Timeline Layout (Birds on a Wire)
With the timeline layout, sometimes called birds on a wire, multiple tasks and milestones are lined up left-to-right in a single row. Here, each phase of the project gets its own timeline, all in one row:
Gantt Chart Layout
OnePager also supports a Gantt Chart or waterfall layout with each task or milestone appearing by itself in its own row:
