Ability to rename (sub/grand) "Total" and move the totals to the beginning or end of the visual

1. Power BI should allow users to rename the sub total/grand total names.

This ability can provide the end users to understand at a glance what the total actually represnts rather than looking into other details.

2. Matrix/table visuals should be flexible enough to move the totals to beginning or end of the values section.

This helps in most cases where the end users want a "Total and breakdown" kind of structure, like for example, totals by Fiscal year in the beginning and break down by quarter