There are two different ways to zoom in gantterAi™:
The first way is gantterAi™ zoom functionality which is using the "Zoom In" or "Zoom Out" buttons on the toolbar or in the View menu of the gantterAi™ editor. This changes the time periods of your gantt chart and allows it to go from a monthly view to a weekly view or vice versa.
However, if you want to zoom in on the entire project as a whole, you can use your browser's zoom functionality.