By default, the gantt chart has 557 columns which represent roughly 18 months. Even your project is more than 18 months, it is possible to visualise it by changing the “Starting Date” of the chart and slide the visible portion.
Another way is to extend the period of the Gantt Chart by adding new columns on the right side of the chart:
- Select the last column of the chart
- Select as many empty columns as you would like