Which feature allows for displaying multiple document columns in a viewer?

The feature that allows for displaying multiple document columns in a viewer is the View Builder. This tool is specifically designed to create customized views of documents, enabling users to select and arrange the columns that are most relevant to their needs. With the View Builder, you can manipulate the layout of the displayed data, tailoring it to showcase different aspects of the documents simultaneously. It provides flexibility in the presentation of information, allowing users to focus on specific data points across multiple documents.

The other options either do not pertain specifically to customizing the view with multiple columns or do not exist within the context of document viewing features in the same way that the View Builder does. For instance, while a Column Selector may suggest features related to selecting which columns to show, it doesn't inherently adjust the layout or configuration of the viewer as comprehensively as the View Builder does. Display Mode typically refers to how information is presented visually, rather than managing the layout of multiple columns. Column Layout might imply the arrangement of columns but does not encompass the full functionality suggested by the View Builder in terms of customizing the viewing experience.