Thank you for your response. But I'm still struggling.
Could you tell me where I can set a variable? If I understand correctly, particular kinds of "action" (such as OnSelect of a button) are necessary to set a variable. Is this correct? I
have no such kind of "action" type control.
What I want to do is to set a value of a checkbox to the default value when a property (a DisplayMode in my case) of a datacard is a specific value (Disabled, for example), but I don't want to do anything when the property is the other value (like Edit).
If there is a way to set a value of a checkbox triggered by the change of a property of a control, that would also work for my case, probably.