The procedure for applying configs to devices in PIis to create, publish, deploy templates.
First navigate to Design -> Feature Design. There exists some 'canned' templates, but for most configurations you wish to apply to a device running NTP you would simply use the CLI template. Expand CLI Templates -> Click 'CLI' -> give it a name and enter the commands to wish to apply (you don't need to enter config t) -> Save as New Template -> There is now a button named 'Publish', click it -> Deploy -> select the appropriate devices.
Thanks for your quick replay, i know how to configure NTP using CLI template but on my devices i already have NTP server configured (each is using different IP) and i was looking for a way to configure on all devices (more then 500) a new NTP server while removing the old ones.
I hoped to achive this goal using the feature template but as i mentioned it's marked in grey so i can't type any values in it!?