Three click support

Three click support adds a level of security when you open an attachment within an email or within a document in a Notes application.

The Open/Save/View dialog box still appears after you double click an attachment. When three click support is enabled, you will then be prompted to confirm the action you have chosen in a second message box:
three click support prompt

To enable this setting, add EnableThreeClicks=1 to the notes.ini settings.