C. Command - Windows File Associations

C. COMMAND - WINDOWS FILE ASSOCIATIONS

Under Windows on PC platforms it is possible to set up file associations so that double clicking on files with the .ptf , extension opens them automatically in D3PLOT.

All of these settings are optional: you should be aware that under the Windows operating system associating a filetype (via its extension) with an application is convenient, but can also be restricting and complicated to undo.