Does changing a category page from one column to three columns require customization?

Changing a category page layout from one column to three columns can be managed through the settings in Magento's admin panel without needing any customization. Magento provides an intuitive interface where users can choose the desired layout configuration for their category pages. This flexibility is built into the platform, allowing merchants to adjust their site's appearance according to their preferences and marketing strategies easily.

When exploring the options related to the need for customization, it's worth noting that while some situations might require additional coding—especially when using custom themes or advanced functionalities—the default Magento settings effectively allow layout adjustments for standard themes without extensive modifications. Thus, for most standard use cases, such layout changes can be managed directly via settings, streamlining the process for store owners and enhancing user experience without the complexities of custom coding.