diff --git a/app.py b/app.py
index 73d61e4..aa5f003 100644
--- a/app.py
+++ b/app.py
@@ -409,6 +409,8 @@ class Handler(BaseHTTPRequestHandler):
             return game.plant_second_plot(world, player, body.get("id") or None)
         if path == "/api/perk":
             return game.buy_perk(player, str(body.get("perk")))
+        if path == "/api/pin":
+            return game.toggle_pin(player, str(body.get("skill")))
         if path == "/api/settings":
             if body.get("overflow") not in ("city", "stop"):
                 return "Bad setting"
diff --git a/game.py b/game.py
index 9f6ff7e..11e8c4e 100644
--- a/game.py
+++ b/game.py
@@ -1033,7 +1033,7 @@ RAID_TRAITS = ["lightly armoured, heavy on archers", "mounted and fast, few bows
 
 # --- world ---------------------------------------------------------------
 
-WORLD_VERSION = 18
+WORLD_VERSION = 19
 
 
 def new_world(now: float, speed: float = 1.0) -> dict:
@@ -1183,6 +1183,10 @@ def migrate(world: dict, now: float | None = None) -> dict:
             for slot in ("ring", "amulet", "trinket"):
                 player["equip"].setdefault(slot, None)
         world["version"] = 18
+    if world["version"] < 19:
+        for player in world["players"].values():
+            player.setdefault("pinned", [])
+        world["version"] = 19
     return world
 
 
@@ -1425,6 +1429,7 @@ def new_player(uid: str, name: str, cls: str, now: float) -> dict:
         "perks": {"bank_slot": 0},
         "garrison": False,
         "donated": 0,
+        "pinned": [],  # skills pinned to the top of the sidebar
     }
 
 
@@ -3841,6 +3846,17 @@ def buy_perk(player: dict, perk: str) -> str | None:
     return None
 
 
+def toggle_pin(player: dict, skill: str) -> str | None:
+    if skill not in SKILL_IDS:
+        return "No such skill"
+    pinned = player["pinned"]
+    if skill in pinned:
+        pinned.remove(skill)
+    else:
+        pinned.append(skill)
+    return None
+
+
 # --- icons ------------------------------------------------------------------------
 # Every item, skill, class, building, prayer and output-less action gets a
 # game-icons.net glyph (CC BY 3.0) and a tint. Families share a shape and are
diff --git a/static/app.js b/static/app.js
index d3146f0..e034b9a 100644
--- a/static/app.js
+++ b/static/app.js
@@ -308,6 +308,16 @@ function nav(id, icon, label, meta = "", extra = "", tip = "") {
   return `<button class="nav ${page === id ? "on" : ""}" data-nav="${id}"${tip ? ` title="${esc(tip)}"` : ""}><span class="ic">${icon}</span><span class="label">${label}</span>${extra}<span class="meta">${meta}</span></button>`;
 }
 
+function skillNav(skill, me, doing) {
+  const busy = doing?.skill === skill.id ? `<span class="dot"></span>` : "";
+  return nav("skill:" + skill.id, skill.icon, skill.name, `${me.levels[skill.id]}`, busy);
+}
+
+function pinnedNav(me, doing) {
+  const pinned = C.skills.filter((s) => me.pinned.includes(s.id) && (!s.class || s.class === me.cls));
+  return pinned.length ? `<div class="navhead">📌 Pinned</div>${pinned.map((s) => skillNav(s, me, doing)).join("")}` : "";
+}
+
 function sidebar() {
   const me = S.me, cls = C.classes[me.cls];
   const doing = me.action && C.actions.find((a) => a.id === me.action.id);
@@ -320,6 +330,7 @@ function sidebar() {
       <div class="cls">${cls.icon} ${cls.name} · ${HEART} <span data-live-hp>${fmt(me.hp)}</span>/${me.max_hp}</div>
       <div class="purse"><span class="gold" title="Gold">${COIN} ${fmt(me.gold)}</span><span class="favour" title="Favour: earned by donating">${FAVOUR} ${fmt(me.favour)}</span></div>
     </div>
+    ${pinnedNav(me, doing)}
     <div class="navhead">City</div>
     ${nav("town", "🏘️", "Town square", `${S.city.population}`, "", `Population ${S.city.population}`)}
     ${nav("council", "📜", "Council & threats", "", raid ? `<span class="alert"></span>` : "", raid ? "A threat is coming" : "")}
@@ -336,8 +347,7 @@ function sidebar() {
       group = skill.group;
       html += `<div class="navhead">${group}</div>`;
     }
-    const busy = doing?.skill === skill.id ? `<span class="dot"></span>` : "";
-    html += nav("skill:" + skill.id, skill.icon, skill.name, `${me.levels[skill.id]}`, busy);
+    html += skillNav(skill, me, doing);
   }
   return html + (S.dev ? devbar() : "")
     + `<p class="credit">Icons by Lorc, Delapouite and others at <a href="https://game-icons.net" target="_blank" rel="noopener">game-icons.net</a>, CC BY 3.0</p>`;
@@ -423,7 +433,7 @@ function skillPage(id) {
     <div class="panel"><div class="skill-head">
       <div class="big">${skill.icon}</div>
       <div class="info">
-        <h2>${skill.name}</h2>
+        <h2>${skill.name} <button class="pin ${me.pinned.includes(id) ? "on" : ""}" data-pin="${id}" title="${me.pinned.includes(id) ? "Unpin" : "Pin"}">📌</button></h2>
         <div class="lv">Level ${level} / 99 · ${fmt(xp)}${ceil ? ` / ${fmt(ceil)}` : ""} XP</div>
         <div class="bar xp thick"><span style="width:${pct}%"></span></div>
       </div>
@@ -1677,6 +1687,7 @@ document.addEventListener("click", (e) => {
   if ("plot" in d) return act("/api/plot", { id: d.plot || null });
   if (d.garrison) return act("/api/garrison", { join: d.garrison === "1" });
   if (d.perk) return act("/api/perk", { perk: d.perk });
+  if (d.pin) return act("/api/pin", { skill: d.pin });
   if (d.favour) return act("/api/favour", { kind: d.favour });
   if (d.food) return act("/api/food", { item: d.food === "cheapest" ? null : d.food });
   if (d.potion) return act("/api/potion", { item: d.potion });
diff --git a/static/styles.css b/static/styles.css
index 2a31494..5c294b1 100644
--- a/static/styles.css
+++ b/static/styles.css
@@ -183,6 +183,10 @@ textarea { width: 100%; resize: vertical; min-height: 60px; }
 .skill-head .info { flex: 1; min-width: 0; }
 .skill-head h2 { margin: 0; font-size: 22px; text-transform: none; letter-spacing: 0; color: var(--text); }
 .skill-head .lv { font-variant-numeric: tabular-nums; color: var(--muted); margin: 2px 0 8px; }
+.skill-head .pin { background: none; border: 0; padding: 0 4px; font-size: 16px; cursor: pointer; vertical-align: middle;
+  filter: grayscale(1); opacity: .35; }
+.skill-head .pin:hover { opacity: .7; }
+.skill-head .pin.on { filter: none; opacity: 1; }
 
 .action {
   background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
diff --git a/tests/test_game.py b/tests/test_game.py
index 459f8c3..a661f97 100644
--- a/tests/test_game.py
+++ b/tests/test_game.py
@@ -1496,6 +1496,24 @@ class FittingTest(unittest.TestCase):
         self.assertEqual(world["city"]["buildings"]["houses"]["fittings"], [])
 
 
+class PinTest(unittest.TestCase):
+    def test_pin_toggles(self):
+        world = world_with(("fred", "commoner"))
+        p = world["players"]["fred"]
+        self.assertIsNone(game.toggle_pin(p, "mining"))
+        self.assertEqual(p["pinned"], ["mining"])
+        self.assertIsNone(game.toggle_pin(p, "mining"))
+        self.assertEqual(p["pinned"], [])
+        self.assertIsNotNone(game.toggle_pin(p, "juggling"))
+
+    def test_old_players_get_pins(self):
+        world = world_with(("fred", "commoner"))
+        del world["players"]["fred"]["pinned"]
+        world["version"] = 18
+        game.migrate(world, T0)
+        self.assertEqual(world["players"]["fred"]["pinned"], [])
+
+
 class IconTest(unittest.TestCase):
     def test_everything_has_a_glyph_in_the_sprite(self):
         sprite = (Path(__file__).resolve().parent.parent / "static" / "icons.svg").read_text()