Basic Customization > Windchill Customization Basics > Customization Overview > Configuration Options > Properties and Preferences > Preferences
  
Preferences
Preferences are set through the Windchill user interface and do not require a server restart. They control application behavior (for legacy reasons, some Properties also control application behavior). Preferences can be implemented on different levels of detail. Preferences can be configured to control the whole Windchill installation, or can be used more narrowly to control an organization’s or an application container’s (e.g. Product, Library), or a specific user’s setup.
See Preference Framework for some additional information on preferences.
The table below provides just a few of the available preferences:
Preference
Description
Change Notice without Change Request
Allows creating a change notice without a change request.
Enable Structure Propagation
Enables propagation of effectivity statements down a product structure.
Digest Notification Schedule
Set up a schedule for Digest Notification. That is, instead of sending individual notification of as events of interest to a user happen, the system will collect and send all notifications in one email according to the administrator-setup schedule.
Display Thumbnails
Controls whether the thumbnail action available in tables.