The Open dialog box allows you to access any files that can be read by SmartPlant Markup Plus to view the files, review markups, or add new markups or markup layers.
The list of file types that can be opened in SmartPlant Markup Plus is defined immediately after the installation process. To make changes to the list, use the File Type Associations tab of the Options dialog box, or access the File Type Associations dialog box from the Start menu by clicking Start > Programs > Intergraph SmartPlant Markup Plus > File Type Associations.