diff --git a/README.md b/README.md
index c49c08f..6511301 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,8 @@
 
 `xtc` is a new, energyXT-inspired digital audio workstation project. It is not a clone and contains no energyXT source code or assets.
 
+![xtc promotional overview: arrangement, piano roll, mixer and modular effects](screenshots/overview.png)
+
 ## Design decisions
 
 - **Modular engine first:** sequencer, instruments, effects, mixers and I/O are nodes in one processing graph.
diff --git a/screenshots/README.md b/screenshots/README.md
index 399e901..4a6f8e9 100644
--- a/screenshots/README.md
+++ b/screenshots/README.md
@@ -3,10 +3,24 @@
 The complete gallery was refreshed after Phases 100–105 on 2026-11-06, including
 MIDI preferences/import, the sample editor, creative workflows and real installed
 VST3 insert chains.
-These are actual rendered application windows and menus on a 1440 × 960 virtual
-X11 screen, without mockups, compositing or image edits.
+The gallery captures are actual rendered application windows and menus on a
+1440 × 960 virtual X11 screen. The promotional `overview.png` is a designed
+composite of cropped, proportionally scaled captures with added headings; the
+other captures have no mockups, compositing or image edits.
 
-![Arrangement with named sections](overview.png)
+![xtc promotional overview: arrangement, piano roll, mixer and modular effects](overview.png)
+
+Regenerate the 2400 × 1800 promotional overview after refreshing the gallery:
+
+```sh
+python3 tools/create_promotional_overview.py
+```
+
+This optional image composition script requires Pillow, Fontconfig (`fc-match`)
+and DejaVu Sans. It uses `sequencer-loop.png`, `piano-roll-velocity.png`,
+`mixer-playing.png` and `track-inserts-vst3.png`; no application UI is fabricated.
+The full screenshot capture target replaces `overview.png` with a raw capture,
+so run the composition script afterwards to restore the promotional version.
 
 The temporary demonstration project starts from
 `examples/projects/modern-session.xtc`, adding Intro/Verse/Chorus/Outro markers,
diff --git a/screenshots/overview.png b/screenshots/overview.png
index 3ea5ba2..47c8822 100644
Binary files a/screenshots/overview.png and b/screenshots/overview.png differ
diff --git a/tools/create_promotional_overview.py b/tools/create_promotional_overview.py
new file mode 100644
index 0000000..8f6a60a
--- /dev/null
+++ b/tools/create_promotional_overview.py
@@ -0,0 +1,77 @@
+#!/usr/bin/env python3
+"""Compose the promotional overview from real gallery captures (requires Pillow)."""
+from pathlib import Path
+import subprocess
+
+from PIL import Image, ImageDraw, ImageFont
+
+ROOT = Path(__file__).resolve().parents[1]
+GALLERY = ROOT / "screenshots"
+WIDTH, HEIGHT = 2400, 1800
+
+
+def font(size, bold=False):
+    family = "DejaVu Sans:style=Bold" if bold else "DejaVu Sans"
+    path = subprocess.check_output(
+        ["fc-match", family, "-f", "%{file}"], text=True
+    ).strip()
+    return ImageFont.truetype(path, size)
+
+
+def main():
+    canvas = Image.new("RGB", (WIDTH, HEIGHT))
+    draw = ImageDraw.Draw(canvas)
+    # A quiet ink/teal gradient keeps the actual application views prominent.
+    for y in range(HEIGHT):
+        t = y / HEIGHT
+        draw.line((0, y, WIDTH, y), fill=(int(13 + 6*t), int(24 + 4*t), int(31 + 5*t)))
+    white, muted, teal = "#edf5f5", "#a4b7c1", "#74dbc1"
+
+    def text(x, y, value, size, color=white, bold=False):
+        draw.text((x, y), value, font=font(size, bold), fill=color)
+
+    def capture(name, box, x, y, w, h):
+        with Image.open(GALLERY / (name + ".png")) as source:
+            crop = source.convert("RGB").crop(box)
+        # Fit without distorting UI proportions; the remaining space is the card.
+        scale = min(w / crop.width, h / crop.height)
+        crop = crop.resize(
+            (round(crop.width * scale), round(crop.height * scale)),
+            Image.Resampling.LANCZOS,
+        )
+        canvas.paste(crop, (x + (w-crop.width)//2, y + (h-crop.height)//2))
+
+    text(80, 38, "xtc", 150, teal, True)
+    draw.line((370, 75, 370, 207), fill="#35525a", width=2)
+    text(420, 63, "A lightweight, modular DAW.", 65, bold=True)
+    text(424, 154, "Compose. Shape your sound. Connect your ideas.", 35, muted)
+    text(82, 252, "ARRANGE YOUR IDEAS", 23, teal, True)
+    text(2320 - draw.textlength("Audio + MIDI sequencing", font=font(23)), 252,
+         "Audio + MIDI sequencing", 23, muted)
+
+    draw.rounded_rectangle((76, 304, 2324, 1158), radius=15, fill="#080f15", outline="#36515b", width=2)
+    capture("sequencer-loop", (0, 20, 1400, 540), 82, 310, 2236, 842)
+
+    cards = [
+        (80, "01", "Write melodies", "Piano roll + note velocities",
+         "piano-roll-velocity", (24, 230, 930, 804)),
+        (836, "02", "Build your mix", "Track / bus routing + automation",
+         "mixer-playing", (24, 230, 1380, 804)),
+        (1592, "03", "Connect your effects", "Modular track insert chains",
+         "track-inserts-vst3", (24, 188, 1356, 425)),
+    ]
+    for x, number, title, caption, source, box in cards:
+        text(x, 1205, number, 23, teal, True)
+        text(x+48, 1196, title, 34, bold=True)
+        text(x, 1253, caption, 24, muted)
+        draw.rounded_rectangle((x, 1309, x+728, 1634), radius=12, fill="#181d23", outline="#354852", width=2)
+        capture(source, box, x+10, 1319, 708, 305)
+
+    draw.line((80, 1690, 2320, 1690), fill="#354852", width=2)
+    text(80, 1720, "LINUX FIRST   /   OPEN SOURCE   /   MIT LICENSE", 23, teal, True)
+    text(1580, 1720, "In development · Actual application captures", 23, muted)
+    canvas.save(GALLERY / "overview.png", optimize=True)
+
+
+if __name__ == "__main__":
+    main()