I would suggest excluding everything that is not needed for this slide from the chart before exporting. The problem with the slides is that you cannot work with enough space, attention, and time is often limited. The best way to get around this is to stay focused as much as he gets. Another way you could try is to split the chart and display a small rectangle at the time, however, this can be confusing, especially if the chart is not well aligned. The third option that comes to mind is a tool with scaling - this may include quick jumps, but it will be distracted when you move around the diagram.
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