Matrix visual – Allow independent drill for parallel hierarchies in compact view

[Srikrishna]

Idea:
In the Matrix visual’s compact (stepped) layout, all Row fields are nested under the first field. This forces unrelated hierarchies to collapse together.

Request:
Enable multiple top-level hierarchies in compact view that can drill independently, e.g.:

• Column 1: Geo Hierarchy (Region → Country)

• Column 2: Product Hierarchy (Category → Product)

Each should have its own +/- icons and expansion state, so collapsing geography doesn’t hide product, and vice versa.

Why it matters:
This is critical for FP&A and operational reporting, where two unrelated hierarchies must be shown together in a dense, compact grid with independent control. Current workarounds (tabular layout or separate visuals) break the desired view.

Benefit:
Improves usability for matrix-heavy reports without losing the efficiency of compact view.