Analyst Workbench Demo — full-screen grid + widgets

This page is a sheet: the master grid below fills the rest of the screen, and a workbench of movable panels reacts to what you address in it.

Tick row checkboxes to feed the selection panels below; drag across cells to address a rectangular block for the range panel.

The workbench

The panels below update in place — drag one by its edge, pull a corner to resize, and the arrangement survives every selection change. It also persists in this browser; the toolbar above the panels resets it to the page default, or copies/downloads it as sidecar-ready JSON (authors commit that file next to the page as its default layout).