Expand/collapse feature after drill down with ⇊

It would be a good addition to be able to drill down on multiple levels in different ways.
Currently, once you use the drill down with double arrow (⇊ - go to next level in the hierarchy), all other options to drill down further are no longer possible unless you go up in the hierarchy again.

After an initial drill down with ⇊, the options should include:
- the expand/collapse feature (+/- icon)
- the ability to drill down further while keeping the original hierarchy level as a total line (expand all down one level in the hierarchy)