public System.bool IsAllowExpressViewLiveEdit {get; set;}
When True, users are allowed to make changes to an ExpressView when the in Live Data (Run) mode. When False, users must click the Stop button on the toolbar before changes may be made.
The default value is false for pre-v2021.1.1 or true for v2021.1.1+
public System.bool IsAllowExpressViewLiveEdit {get; set;}