Which button must be clicked to adjust print settings for fitting all columns on one page?

To adjust print settings for fitting all columns on one page, the "Scaling" option is essential. Scaling allows users to change the size of the printed content relative to the paper size. By selecting a scaling option that fits all columns onto a single page, such as "Fit to Page," the user can ensure that all necessary information is visible and neatly organized without requiring multiple pages.

This option is particularly useful when dealing with tables or data that span several columns, as it allows for a more professional presentation of the material. While other choices may relate to aspects of printing—like orientation or selection—the specific action needed to fit everything onto one page is tied directly to scaling options.