How i can change minimum stay for seasons period ?

[Ims0]

Please , it was button for add note ( not private note ) in calender , I can change minimum stay , now i cant find this button

[Emiel1]

@Ims0 

It was button "add ruleset". It is on the right screen on the multicalender.

So list the ruleset you allready created and change it, or make a new one.