The Review panel¶

The Style panel's Review tab (next to Style / Advanced / Create) opens with a read-only, at-a-glance summary of the selected Section, all reflecting the active viewport: a mini layout diagram, the column count cascade across every breakpoint (mobile → large desktop), gap, box model (padding/margin, read from the real rendered element), content width, and background. A brand-new, still-empty Section shows the "Choose a starting layout" prompt here instead.

When a breakpoint's column count doesn't divide evenly (e.g. 3 columns at a count whose wider sibling has more), the Review panel flags an Uneven column wrap warning with a one-click Stretch last column to fill action: it sets fill_last, which stretches the last column to fill the remainder of its row at just the affected breakpoints, computed in pure CSS per viewport.

Three column placeholders with Stretch last column to fill off — the third wraps to its own row at partial width — Off: the third column wraps to its own row at partial width.

The same three column placeholders with Stretch last column to fill on — the third column now spans the full row width — On: the last column stretches to fill the row.