Formula workspace

The formula workspace gives one formula the entire canvas. The compact editors in the panels are fine for a two-step formula; when one grows branches, the workspace lays the whole tree out with live values at every step and your page's data alongside.

The full-screen formula workspace with the chip strip, selected-step editor, and data rail

Open it

Click the full-screen icon beside any formula:

On an Expression entry in the State panel .
On an $expression event binding in the Events panel .

The canvas is replaced by the workspace, and the tab bar shows a breadcrumb — the file's name, then fx and the formula's name. Click Back in the tab bar (or Close in the workspace header) to return to the normal canvas; your edits are already in the document.

The layout

Header — the formula's name and kind (a state expression or an event expression), a Catalog button that opens the formula palette , and Close .
Chip strip — the whole formula as a left-to-right pipeline of chips, each with its live value badge. This is the map.
Editor pane — the currently selected step, edited with the same operator/operand form as everywhere else. A "Selected" line above it names the step you're on.
Data rail — the page's live data on the right: every value in scope with its type and an expandable tree of its contents, exactly as the Data explorer would show it. You build the formula while looking at the data it consumes.
Footer — the bottom line, literally: = result in green, computed live. Formulas that change a value rather than produce one are marked "(mutates target)", and an evaluation problem shows its error message here in red.

Navigate by chip

Click any chip to select that step — the editor pane retargets to it, so you edit one piece of a large formula without scrolling through the whole nested form. Click the first chip to jump back to the start of the pipeline; edits always land in the right place in the tree, and each edit is a single undo step.

Live-context previews

The badges, the data rail, and the footer result are all computed against the running page — real fetched data, real list items, real state. Two details make this more useful than a static preview:

An event formula that lives inside a repeated list is previewed with the first item's data, so $map/item references show real values.
If the canvas hasn't produced data yet (for example, the page hasn't rendered since you opened the file), the footer says so — "Preview unavailable" — rather than showing stale numbers. Values reappear as soon as the canvas renders.

Insert from the catalog

The Catalog button opens the same searchable palette as the inline editors, but here a pick replaces the selected step — so you can navigate to a branch by chip, then drop average or a switch scaffold exactly there. Library formulas are copied into your file's state on first use, as described in Formulas and expressions .