A synoptic file is a text file written in a subset of HTML. It defines the image map as well as the script functions to run when hotspots are clicked. Note that the image itself is in a separate file that is referenced by the HTML.
Although you can save synoptic files anywhere, you should keep them with your projects or Softimage data files for ease of maintenance.
Use the Synoptic folder of the current project for files that are specific to that project, for example, for a synoptic file that was designed for use with a particular model. This is the default location.
Use your user location for generally useful synoptic files that you want to use in many different projects.
Use a workgroup location for generally useful synoptic files that you want to share with others in your workgroup.
You can quickly switch between these paths using the Paths button in file browsers.