Codex Callback Card

A two-panel comparison card for Power BI — one headline rate per panel, the counts behind it, and the revenue at stake, with the second panel showing its variance against the first.

Codex Callback Card is built for the question "how does this window compare to that one?" — retention this week against last, resolution across two shifts, conversion before and after a change. Each panel carries its own label, headline value, up to three supporting metrics and an optional highlight value, so the whole comparison reads in one tile instead of four.

IDEAL FOR

• Period-over-period comparison of a rate, against a baseline panel
• Retention, resolution, conversion and completion rates shown with the counts behind them
• Surfacing the revenue at stake next to the rate that drives it
• Executive header tiles where the comparison matters more than the raw number
• Replacing a row of separate cards that only make sense read together

KEY FEATURES

• Panel label, headline value, up to three supporting metrics and an optional highlight value per panel
• Variance chip on each panel after the first, measured automatically against the first panel as baseline — no delta measure to write
• Side-by-side or vertical-stack layout
• Conditional formatting (fx) on panel background, both headline colours, and the label, detail and highlight colours
• Headline and metric values honour each measure's own format string
• Full font control — family, size, bold, italic, underline and alignment — on headline, label and detail text
• Metrics 1–3 and the highlight value can each be switched off
• Panel background, corner radius, padding and gap are all adjustable
• Hover tooltip showing the panel's label, headline and metric values
• Click a panel to cross-filter other visuals; Ctrl-click to add to the selection
• Right-click context menu across the whole card
• High contrast mode support

Built by Nexus Codex. Part of a growing collection of premium Power BI visuals designed for serious dashboards.