Basic Customization > Windchill Customization Basics > Best Practices for Customizing Files Supplied by PTC
  
Best Practices for Customizing Files Supplied by PTC
The following sections call out specific file types and directories where sites typically modify PTC files. The text recommends procedures to follow that work in concert with the maintenance installation process to avoid unexpected file overwrites.
If you are modifying files that are not specifically identified in the following sections, consult Automated Build Deployment Process — Azure to determine if the procedures outlined there can assist with managing your changes.
Often, sites make changes to the following types of files:
RBINFO files
*.properties files
HTML templates
XML files
WindchillInfo*Engine tasks
INI files
Client JAR files
Additionally, your site may modify other files in the codebase directory.
Use the information in the following sections to help you manage your customizations.