Max10 PLL input clock switchover example?

Hi

I read max10 datasheet and it says that its PLLs support input clock switchover. I tried to used altpll IP-core in qsys(Platform design) to configure this feature but the "clock switchover"-Tab is always inactive and I couldn't find the way to activate it.

Is there any example for using PLL input clockswitchover in Max10?

Thanks alot.

Bien