Sheet files are used to assemble model files for plotting and viewing purposes. Every sheet file has a drawing area, title block, and border and represents one plotted drawing. Sheet files shall be assembled in paper space, at a 1 = 1 scale and set up to automatically plot at the largest standard scale that fits the sheet. In Autodesk Architectural Desktop, separate layout tabs may be used for plotting different sizes of the same drawing within the same sheet file. The typical multiple file approach using model and sheet files is illustrated below. Model files are externally referenced into the sheet file’s model space. For the purposes of consistency and minimizing data entry NIH has developed a title block template. Use of the provided title block (see section 5.0) is required unless indicated by an Organization Supplement.