The package combines a document’s columns into a PDF “article thread”. PDF readers that support this mechanism (probably Adobe Acrobat/Reader only) can be instructed to scroll automatically from column to column, which facilitates on-screen reading of two-column documents.

Even for single-column documents, threadcol supports the creation of multiple article threads, which help organize discontiguous but logically related regions of text into a form that the user can scroll through as if its contents were contiguous.

The author is Scott Pakin. The package is Copyright © 2013 Scott Pakin.