Who can use this capability
Anyone can use Gantt View. Viewers and Editors can make changes, but they do not affect other collaborators or display when exported.
Only the sheet's Owner and Admins can make changes to the exported timeline.
Adjust the Gantt chart timeline
With the Zoom In or Zoom Out icons in the Gantt chart header, you can quickly change the timeline zoom level.
The Gantt chart has four timeline zoom levels: quarter, month, week and day.
Use the Zoom In or Zoom Out icons to adjust the view to what you need.
In the Gantt chart of a Report, you can save changes to the Gantt chart timeline, and these changes appear when exported. Only Viewers do not have access to this option.
If you are a sheet Owner or Admin access, you can further configure and customize the Gantt chart's Primary and Secondary headers by modifying the Timeline Display directly in the sheet's Project Settings.