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Instructions provided describe how to change the default Output Image Quality (OIQ) for exported maps. In ArcGIS 9.0 the default OIQ for exports is set to Best. This can result in very large export files.
Map export dialog parameters are contained in HKEY_CURRENT_USER\Software\ESRI\Export\ExportObjectsParams. This registry key is not created until the first map is exported in any format from ArcMap by the current user. The String Value that controls the OIQ for each format is the RasterResampleRatio. Some export formats do not support OIQ and will not be listed.
Warning: The instructions below include making changes to essential parts of your operating system. It is recommended that you backup your operating system and files, including the registry, before proceeding. Consult with a qualified computer systems professional, if necessary. Esri cannot guarantee results from incorrect modifications while following these instructions; therefore, use caution and proceed at your own risk.