3.2 Optional Material

For practical reasons, a printed version of the DLMF must be constrained in size to not much more than 1000 pages. Electronic versions are much less restricted, and thus may contain additional material. Also, material that is most likely to change quickly (e.g. lists of available software) should probably be relegated to the more dynamic electronic media. Thus we provide L^ATEX environments that authors use to mark sections of material as being appropriate only for certain media. Again, feedback is needed for proofreading, so such marked material is indicated by bars in the margin with an appropriate label.