PhaseIndicator - set buttons invisible?

Hi everyone,

i'm using UI-element "PhaseIndicator" for the first time in my own Z-WD4A application... Not very hard to manage so far, but there's one point i dont get rid of and i hope that u have some hints for me:

Is it possible to hide buttons for "previous item" / "next item"? i dont need these functions and want to hide them, but I and can't find any option/checkbox/method for that...

thanks in advance!