Final answer:
To insert a think-cell chart in PowerPoint, you would click on the appropriate button in the think-cell tab. The button may be labeled 'Insert Chart', 'Add Chart', or something similar.
Step-by-step explanation:
The question is asking about how to insert a think-cell chart, which is a feature used in PowerPoint to enhance presentations with complex charts and graphs.
This action is related to the interface of think-cell, a software add-in for PowerPoint that provides charting capabilities. The button to insert a think-cell chart can typically be found on the PowerPoint ribbon under the think-cell tab. While the provided reference information regarding the ZOOM key on a calculator is not directly relevant to inserting a think-cell chart, it can be inferred that charting and data visualization are common tasks that span across different software and technologies.
Given the context, we would look for an 'Insert Chart', 'Add Chart', or similar named button in the think-cell toolbar to accomplish this task.