Preferences settings 
TWiki has these levels of preferences settings:
 
-  System-level settings: TWikiPreferences 
-  Site name, proxy settings, access control, skin
 
-  Site-level settings: Main.TWikiPreferences 
-  Site admin can overload system level settings
 
-  Web-level settings: located in each Web, e.g. WebPreferences topic 
-  Web specific access control, navigation links, colors
 
-  User-level settings: In each user's profile page, e.g. TWikiGuest topic 
-  Settings that are only in effect when this user is logged in, such as LINKTOOLTIPINFO
 
-  Topic-level settings: Affecting current topic, for web applications
Preferences can be overridden by the next level down unless locked down by a FINALPREFERENCES setting at a higher level.
Related Topics: TWikiVariables, 
TWikiPreferences, 
Main.TWikiPreferences
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Contributors: TWiki:Main.PaulineCheung
, 
TWiki:Main.PeterThoeny