Changing the Default Material or Library Modify the default material or default standard material library in the Preferences. Select File > Preferences to open the Preferences window. Under Category, select Materials. To change the default material, click on the value for Default materials and select a different material from the list. To change the default library, click on the value for My standard materials and browse to the location of the database. Click OK. Tip: If you want to use multiple libraries, you can set up an environment variable.