By default when you go to Resource Workloads Portlet, select 'Configure' option and then 'Time-scaled Value' appears these values as default
Rolling Date = Start of Current Week
Time Scale = Week
Number of Time Periods = 10
If you need to change these values for your own personal configuration, follow this instructions to make a a configuration change in the application.
Note: This change only will change the values of the logged user, the others users will continue seeing the default values, namely, is a change by user, not as global setting. To change the configuration for all users, go to the Resource Workloads Portlet definition in Studio Administration.