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Preferences

General

General Settings

Display chooser on login
If set, the session manager will ask you to choose a session every time you log in to Xfce.
Automatically save session on logout
This option instructs the session manager to save the current session automatically when you log out. If you don't select this option you'll be prompted whether you want to save the current session on each logout.
Prompt on logout
This option disables the logout confirmation dialog. Whether the session will be saved or not depends on whether you enabled the automatic saving of sessions on logout or not.

Application Autostart

Application Autostart Settings

Trigger
In this dropdown menu you can select when you want to trigger the selected action. This allows to run custom commands e.g. on logout, suspend etc.

Session

Active Session Settings

Please note that changing e.g. Priority or Restart Style of an item in the list only takes effect if you save your session (by clicking the Save Session button).
Restart Style
In this dropdown menu you can select how an application shall be restarted by the session manager.

Advanced

Advanced Settings

Launch GNOME services on startup
Enable this option if you need the GNOME keyring daemon to be run on startup.
Launch KDE services on startup
Enable this option if you plan to run KDE applications as part of your Xfce Desktop session. This will notably increase the startup time, but on the other hand, KDE applications will startup faster. Some KDE applications may not work at all if you don't enable this option.
Manage remote applications
Allow the session manager to manage applications running on remote hosts. Since this option may constitute a security risk, by listening to a TCP port on your system, do not enable it unless you know what you are doing.
System administrators may want to disable this option globally using the session managers KIOSK capabilities.