the directory where attachments are written just before launching the application that is associated with their MIME type.

the directory where manitou icons files are to be found. The path set at install time is used by default, but it can be changed later, if for example, icons should be read from a shared network drive.

the directory where help files reside. The default value is empty and means that they're looked up in a location depending on the installation and the current language defined by the OS environment.

A command that will be launched when an URL is clicked. If it contains $1, that will be replaced by the URL to be opened, otherwise the URL will be appended at the end of the command. Examples:

mozilla-xremote-client 'openurl($1,new-window)'
kfmclient openURL

Note that it can be different from the program used to open 'text/html' attachments.