in zk.xml
add this below line and change the theme value upon your wish
<library-property> <name>org.zkoss.theme.preferred</name> <value>silvertail</value> </library-property>
in zk.xml
add this below line and change the theme value upon your wish
<library-property> <name>org.zkoss.theme.preferred</name> <value>silvertail</value> </library-property>