Create a property that defines the default selection for a column in a table. It is very needed in Calculation Groups, but all the tables/columns of a model could benefit. If that column is not referenced in the report, it should be filtered by default. Ideally, the default is defined by a DAX expression, so that it could be adapted to the user connected to a data model dynamically. It is acceptable that there should be a single selection, it is not necessary to support multiple selections for this feature. If a slicer is applied to a report, it should provide the default selection, even though the user can make a different choice. This is the only change required to the report user interface layer of Power BI. This feature should be similar to the "default member" property in a multidimensional model.