Assuming the D&D 5e by Roll20 sheet, I don't think so. By coincidence, I was working with this last night, because I too, would like this to be the default. Although you can set the value to off, on, or partial, doing so programatically doesn't change the behavior. It appears to be similar to other behaviors in the sheet, where it is not set up properly to receive value changes from the API. This behavior is not universal across the sheet, indicating that it is a bug in how those sections are set up. Repeated requests to have it fixed, along with more knowledgeable people than I pointing out where the problem lies and how to fix it have not resulted in any change. It's frustrating.