Zoom In and Out
Navigate to the Company level Resource Planning tool.
Click Assignments and select Gantt (Beta).
Click the zoom in
icon or zoom out 
icon to view the Gantt from a single day, up to many years.
Navigate to the Company level Resource Planning tool.
Click Assignments and select Gantt (Beta).
Click the zoom in icon or zoom out icon to view the Gantt from a single day, up to many years.