Installing External Auto-Viewers
This options panel (Options > Program Options... from the main menu and then select Auto-Viewers) allows you to specify programs that will be activated when one of the files associated with the view is highlighted.
This options panel is used to define Auto-Viewers. They can also be quickly turned off and on from the main menu (Tools > Auto-Viewers On/Off >). Although called 'Viewers' for that is what they are commonly used for (e.g. displaying graphic files or playing MP3 files) what programs are set up as Viewers and what they do is up to you.
FileBoss provides a related facility called External Tools that can be listed on the popup or main menus when one of their associated files is highlighted. Click here for more information about External Tools.