diff --git a/power-report.py b/power-report.py
index ed92309..9671eb0 100755
--- a/power-report.py
+++ b/power-report.py
@@ -222,6 +222,12 @@ def main():
     if len(args.tags) > 1:
         fig, (ax1, ax2) = plt.subplots(2, 1, figsize=(11, 7), sharex=True)
         palette = ("#c0392b", "#2980b9", "#27ae60", "#8e44ad", "#d35400", "#16a085")
+        # Keep legend/labels short: shorten the on-plot names and drop the
+        # per-machine CPU names (they go in the printed summary, not the chart).
+        def short(t):
+            s = labels.get(t) or t
+            s = s.replace("-headless", "").replace("_", " ")
+            return s if len(s) <= 16 else s[:15] + "…"
         for i, tag in enumerate(args.tags):
             color = palette[i % len(palette)]
             d = data[tag]
@@ -229,21 +235,19 @@ def main():
                 continue
             t0 = d["pkg"][0][0]
             pts = [((t - t0) / 60, v) for t, v in d["pkg"] if v is not None]
-            ax1.plot([p[0] for p in pts], [p[1] for p in pts], label=label(tag), color=color, lw=1)
+            ax1.plot([p[0] for p in pts], [p[1] for p in pts], label=short(tag), color=color, lw=1)
             tt = [((t - t0) / 60, v) for t, v in d["temp"] if v is not None]
             if tt:
-                ax2.plot([p[0] for p in tt], [p[1] for p in tt], label=label(tag), color=color, lw=1)
+                ax2.plot([p[0] for p in tt], [p[1] for p in tt], label=short(tag), color=color, lw=1)
         ax1.set_ylabel("package W")
-        ax1.legend(fontsize=8)
-        cpus = [data[t]["cpu"] for t in args.tags if data[t]["cpu"]]
-        cpu_note = "  |  ".join(dict.fromkeys(cpus)) if cpus else "unknown CPU"
-        ax1.set_title(f"package power & CPU temp — {len(args.tags)} runs\nCPUs: {cpu_note}")
+        ax1.legend(fontsize=8, title="machine", title_fontsize=8)
+        ax1.set_title(f"package power & CPU temp — {len(args.tags)} machines")
         ax1.grid(alpha=0.3)
         ax2.set_ylabel("CPU temp (°C)")
         ax2.set_xlabel("minutes from start")
         ax2.legend(fontsize=8)
         ax2.grid(alpha=0.3)
-        out = os.path.join(GRAPHS, "compare-before-after.png")
+        out = os.path.join(GRAPHS, "power-thermal-compare.png")
         fig.tight_layout()
         fig.savefig(out, dpi=110)
         plt.close(fig)