When switching from one Gantt representation to another — which happens frequently since it is necessary to move from project-level granularity to work-package-level granularity — the zoom level is reset each time. I often ended up with the "Two days" zoom level selected, which makes reading the diagram almost impossible, especially for tasks whose dates fall outside the visible range due to this zoom setting.
In such cases, I was forced to start by adjusting the zoom level.
