diff --git a/agents.md b/agents.md
index 7213c1e..50a2ded 100644
--- a/agents.md
+++ b/agents.md
@@ -305,4 +305,4 @@ cargo run -p ely-doc          启动一个应用（ElyDoc 先 cargo build -p ely
 - 2026-10-15（用户报：ElyMark 源码模式“测”后的插入点画在“测”的中间）：组件库 `CodeEditor` 原按“列 × m 的宽”放插入点、选区、按下处与输入法框，中日韩字与表情约宽两格。组件库 9fb607b 起按 gpui 排好的这一行定位（`editor::measure`，含着色带来的字重），块状与下划线插入点取所在字的宽；标尺与缩进参考线仍按列（R6.8）。上下移动仍按字数记目标列。cd61653：按下处取最近的字首或行末（gpui 的 `closest_index_for_x` 越过末字字首即给行末）；上次绘制得出的括号与配对位置只属当时的文字（`Buffer` 每次改动换一个戳），输入法改字后、下次绘制前的测量不用它们（原先把新字切进不同字体段，DirectWrite 崩溃）。
 - 2026-10-15（用户报：ElyMark 三、四级标题不显眼）：组件库 5954132 起标题字号随正文按 Typora 的倍数（一至六级 2.25、1.75、1.5、1.25、1、1），一律加粗，六级为次要色，行高为字号的 1.3 倍（原为固定的 24、20、16、14 像素，正文 13，三、四级只是中等字重）（R6.9）。90bd37b：粗体与标题同一字重（原粗体为半粗，标题里的粗体反而更细，正文粗体随之由半粗改为粗，同 Typora）；标题行高按自身字号取 1.3 倍。Windows 真窗口核对（`.work/r69`）：可视模式各级标题分明、“你好↵测试”两行，源码模式“测”后的插入点落在两字之间。
 - 2026-10-15（用户报：macOS 打开一个文档，程序坞里有两个同样的图标）：LOK worker 在应用包的 `Contents/MacOS` 里启动 AppKit，系统按包的 Info.plist 把它也登记为常规应用（`lsappinfo` 里应用与 worker 都是 Foreground），程序坞多一个图标；内核自己从不设激活策略。worker 在内核启动 AppKit 之前（`Lok::hook` 打开内核之后、调钩子之前）把本进程主包信息里的 `LSUIElement` 设为真，AppKit 登记时即为辅助应用（无程序坞图标、无菜单栏，仍可建屏外窗口）；钩子之后核对激活策略是辅助，不是即报错、不启动（`ffi/accessory.rs`）；包外的 worker（`cargo run`、单测）无包可登记，策略为禁止，此时改设辅助（R6.12 第 2 轮）。原先在登记之后才改策略，审查实测 15 次启动有 11 次先登记为 Foreground 约 30 毫秒（R6.12 第 1 轮）。`tests/scripts/dock-macos.sh` 连续启动三个应用与包外的开发构建，从 worker 启动起采样其类型到首块图块，见 Foreground 即失败（R6.12）。
-- 2026-10-15（用户报：ElyShow 编辑区滚轮与上下键不换页，三端）：内核在未选中对象时把上下键当作滚动窗口（`fupoor.cxx`），Ely 的画布整页适合、无处可滚，滚轮同样。`LokView::turn_parts`（ElyShow 首次适合时调用）之后：整页可见时滚轮换页（`view/turn.rs`：每格一页；触控板一次手势只换一页，惯性不算，静止 250 毫秒或新手势再计），未选中对象、未编辑文字时上下键换页；视图发 `Turn`，ElyShow 从视图所示的页起算（连续换页累加），经缩略图条同一路径 `show_part`，到首末页即停；后台读回的当前页只在视图已无待落地输入时采用，排队的换页不被先前的读取拉回（R6.13）。
+- 2026-10-15（用户报：ElyShow 编辑区滚轮与上下键不换页，三端）：内核在未选中对象时把上下键当作滚动窗口（`fupoor.cxx`），Ely 的画布整页适合、无处可滚，滚轮同样。`LokView::turn_parts`（ElyShow 首次适合时调用）之后：整页可见时滚轮换页（`view/turn.rs`）：滚轮按本平台每格的行数（`ely_lok::notch`：macOS 1，Windows 取系统设置，X11 与 Wayland 为 3）计格，每格一页；不足一格的行（X11 与 Windows 的触控板）与像素（macOS、Wayland 的触控板）一次手势只换一页，惯性不算；有起止的手势（macOS）只到结束才算完，没有的静止 250 毫秒再计。上下键经有序输入队列交 worker（`TURN_KEY`），worker 按之前各输入回报后的状态判定：无选区、无选中对象、无插入点即换页，否则照常交内核（Tab 之后紧接的 Down 移动所选对象，不换页）；视图发 `Turn`，ElyShow 从视图所示的页起算（连续换页累加），经缩略图条同一路径 `show_part`，到首末页即停；后台读回的当前页只在视图已无待落地输入时采用，排队的换页不被先前的读取拉回（R6.13）。
diff --git a/apps/ely-show/src/tests/turn.rs b/apps/ely-show/src/tests/turn.rs
index 4de7bf3..03d4447 100644
--- a/apps/ely-show/src/tests/turn.rs
+++ b/apps/ely-show/src/tests/turn.rs
@@ -2,7 +2,7 @@ use ely_lok::LokView;
 use ely_office::prelude::*;
 use gpui::{Entity, ScrollDelta, ScrollWheelEvent, TestAppContext, VisualTestContext, point};
 
-use super::objects::blank;
+use super::objects::{blank, selection};
 use super::{counts, quiet, settle, update};
 use crate::deck::Deck;
 
@@ -22,9 +22,10 @@ fn current(shown: &mut VisualTestContext, deck: &Entity<Deck>) -> usize {
     shown.update(|_, app| deck.read(app).active_tab().map(|tab| tab.extra.slides.current).expect("a tab"))
 }
 
-fn wheel(shown: &mut VisualTestContext, lines: f32) {
+/// Whole notches, in this platform's lines.
+fn wheel(shown: &mut VisualTestContext, notches: f32) {
     let middle = shown.update(|window, _| window.viewport_size()).center();
-    let delta = ScrollDelta::Lines(point(0.0, lines));
+    let delta = ScrollDelta::Lines(point(0.0, notches * ely_lok::notch()));
     shown.simulate_event(ScrollWheelEvent { position: middle.into(), delta, ..Default::default() });
 }
 
@@ -59,4 +60,8 @@ fn the_wheel_and_up_down_turn_slides() {
     assert_eq!(current(&mut shown, &deck), 1, "Up turns back");
     wheel(&mut shown, 1.0);
     assert_eq!(current(&mut shown, &deck), 0, "the wheel turns up");
+    // Down queued behind Tab moves the object Tab picks.
+    shown.simulate_keystrokes("tab down");
+    assert_eq!(current(&mut shown, &deck), 0, "Down after Tab moves, not turns");
+    assert!(shown.update(|_, app| selection(app, &deck)).is_some(), "Tab picked an object");
 }
diff --git a/crates/ely-lok/src/client.rs b/crates/ely-lok/src/client.rs
index 133bbec..5b82508 100644
--- a/crates/ely-lok/src/client.rs
+++ b/crates/ely-lok/src/client.rs
@@ -237,6 +237,14 @@ impl Worker {
         Ok(())
     }
 
+    /// Up or Down: whether it turned, not reaching the kernel.
+    pub fn turn_key(&mut self, doc: &Doc, char_code: u32, key_code: i32) -> io::Result<bool> {
+        let doc_id = self.doc_id(doc)?;
+        let payload = Pack::new().u64(doc_id).i64(char_code as i64).i64(key_code as i64).bytes();
+        let reply = self.request(tag::TURN_KEY, &payload)?;
+        Ok(Unpack::new(&reply).u64()? == 1)
+    }
+
     /// Drags a selected object's handle, start then end.
     pub fn drag_graphic(&mut self, doc: &Doc, from: (i32, i32), to: (i32, i32)) -> io::Result<()> {
         for (kind, (x, y)) in [(0, from), (1, to)] {
diff --git a/crates/ely-lok/src/events.rs b/crates/ely-lok/src/events.rs
index 2e5928b..2259903 100644
--- a/crates/ely-lok/src/events.rs
+++ b/crates/ely-lok/src/events.rs
@@ -362,11 +362,14 @@ pub fn stop_all(docs: &HashMap<u64, Document>) {
 
 /// The current generation of `id`.
 pub fn generation(id: u64) -> u64 {
-    slots()
-        .lock()
-        .expect("the events lock")
-        .get(&id)
-        .map_or(0, |slot| slot.batch.generation)
+    slots().lock().expect("the events lock").get(&id).map_or(0, |slot| slot.batch.generation)
+}
+
+/// Whether `id` shows a selection, object or caret.
+pub fn picked(id: u64) -> bool {
+    let slots = slots().lock().expect("the events lock");
+    let Some(batch) = slots.get(&id).map(|slot| &slot.batch) else { return false };
+    batch.graphic.is_some() || !batch.selection.is_empty() || batch.cursor_visible && batch.cursor.is_some()
 }
 
 /// Blocks until documents have unpushed events.
@@ -399,12 +402,7 @@ pub fn clear_result(id: u64) {
 
 /// The completion the last dispatch reported.
 pub fn take_result(id: u64) -> Option<(String, bool)> {
-    slots()
-        .lock()
-        .expect("the events lock")
-        .get_mut(&id)?
-        .result
-        .take()
+    slots().lock().expect("the events lock").get_mut(&id)?.result.take()
 }
 
 /// The bridged a11y text now.
diff --git a/crates/ely-lok/src/ipc.rs b/crates/ely-lok/src/ipc.rs
index 4dc2cea..5d90257 100644
--- a/crates/ely-lok/src/ipc.rs
+++ b/crates/ely-lok/src/ipc.rs
@@ -88,6 +88,8 @@ pub mod tag {
     pub const REVISION: u8 = 34;
     /// One layer's pixels from the last `SLIDE_LAYERS`.
     pub const SLIDE_LAYER: u8 = 35;
+    /// Up or Down: turns the part when nothing is picked.
+    pub const TURN_KEY: u8 = 36;
     pub const OK: u8 = 100;
     pub const ERR: u8 = 101;
 }
diff --git a/crates/ely-lok/src/lib.rs b/crates/ely-lok/src/lib.rs
index 83f370a..c22b8ad 100644
--- a/crates/ely-lok/src/lib.rs
+++ b/crates/ely-lok/src/lib.rs
@@ -20,7 +20,7 @@ pub use client::{
 };
 #[cfg(feature = "view")]
 pub use view::{
-    CONTEXT, Copy, Cut, Geom, Layout, LokError, LokView, Paste, Reported, Turn, ZOOM_STEPS,
+    CONTEXT, Copy, Cut, Geom, Layout, LokError, LokView, Paste, Reported, Turn, ZOOM_STEPS, notch,
     Zoomed, init, layout, paper, read_off, scheme,
 };
 #[cfg(feature = "view")]
diff --git a/crates/ely-lok/src/view.rs b/crates/ely-lok/src/view.rs
index 23ee2d8..5e2cce1 100644
--- a/crates/ely-lok/src/view.rs
+++ b/crates/ely-lok/src/view.rs
@@ -34,7 +34,7 @@ pub use input::{CONTEXT, Copy, Cut, Paste, init};
 pub use off::read_off;
 pub use render::{paper, scheme};
 mod turn;
-pub use turn::Turn;
+pub use turn::{Turn, notch};
 
 pub(crate) use crate::{TILE_TWIPS, TWIPS_PER_PIXEL};
 
diff --git a/crates/ely-lok/src/view/input.rs b/crates/ely-lok/src/view/input.rs
index dd227e0..21a90d6 100644
--- a/crates/ely-lok/src/view/input.rs
+++ b/crates/ely-lok/src/view/input.rs
@@ -64,6 +64,18 @@ pub(super) enum Input {
     Visible(Rect, (u32, i32)),
     /// Shows sheet or slide `part`, from 0.
     Part(usize),
+    /// Up or Down; turns `step` parts when nothing is picked.
+    Turn {
+        char_code: u32,
+        key_code: i32,
+        step: i32,
+    },
+}
+
+/// What an input gives back.
+pub(super) enum Back {
+    Copied(String),
+    Turned(i32),
 }
 
 impl Input {
@@ -73,6 +85,7 @@ impl Input {
             // Arrows, Home, End, Page keys, Escape.
             Input::Key { key_code, .. } => !matches!(key_code & 0x0FFF, 1024..=1031 | 1281),
             Input::Mouse(_)
+            | Input::Turn { .. }
             | Input::Copy { cut: false }
             | Input::Visible(..)
             | Input::Part(_)
@@ -169,7 +182,7 @@ fn lok_button(button: MouseButton) -> Option<i32> {
 }
 
 /// Runs one input; gives a copy's mark and the revision.
-pub(super) fn run(worker: &Mutex<Worker>, doc: &Doc, input: Input) -> (io::Result<Option<String>>, Option<u64>) {
+pub(super) fn run(worker: &Mutex<Worker>, doc: &Doc, input: Input) -> (io::Result<Option<Back>>, Option<u64>) {
     let mut worker = worker.lock().expect("the worker lock");
     let counts = !matches!(input, Input::Visible(..));
     let copied = apply(&mut worker, doc, input);
@@ -181,12 +194,16 @@ pub(super) fn run(worker: &Mutex<Worker>, doc: &Doc, input: Input) -> (io::Resul
     (copied, now)
 }
 
-fn apply(worker: &mut Worker, doc: &Doc, input: Input) -> io::Result<Option<String>> {
+fn apply(worker: &mut Worker, doc: &Doc, input: Input) -> io::Result<Option<Back>> {
     let done = match input {
         Input::Key {
             char_code,
             key_code,
         } => worker.post_key(doc, char_code, key_code),
+        Input::Turn { char_code, key_code, step } => {
+            let turned = worker.turn_key(doc, char_code, key_code)?;
+            return Ok(turned.then_some(Back::Turned(step)));
+        }
         Input::Mouse(event) => worker.post_mouse(doc, event),
         Input::Drag { from, to } => worker.drag_graphic(doc, from, to),
         Input::Visible(area, scale) => doc.visible_area(worker, area, scale),
@@ -195,9 +212,8 @@ fn apply(worker: &mut Worker, doc: &Doc, input: Input) -> io::Result<Option<Stri
         Input::Theme(scheme) => worker.run(doc, "view.theme", &[scheme]),
         Input::Text { commit, text } => worker.post_text(doc, commit, &text),
         Input::Copy { cut } => {
-            return clip::copy_out(worker, doc, cut, |clip| {
-                clipboard::write(clip).map_err(io::Error::other)
-            });
+            let copied = clip::copy_out(worker, doc, cut, |clip| clipboard::write(clip).map_err(io::Error::other));
+            return copied.map(|copied| copied.map(Back::Copied));
         }
         Input::Run { commands, at } => {
             let values: Vec<Vec<&str>> =
@@ -299,7 +315,7 @@ impl LokView {
         cx: &mut Context<Self>,
     ) {
         if self.walk(&event.keystroke, cx)
-            || self.turn_key(&event.keystroke, cx)
+            || self.turn_key(&event.keystroke)
             || self.key_down(&event.keystroke)
         {
             cx.stop_propagation();
diff --git a/crates/ely-lok/src/view/lane.rs b/crates/ely-lok/src/view/lane.rs
index 6920473..bc9daf8 100644
--- a/crates/ely-lok/src/view/lane.rs
+++ b/crates/ely-lok/src/view/lane.rs
@@ -9,7 +9,8 @@ use std::{
 use futures::{StreamExt, channel::mpsc, select_biased};
 use gpui::Context;
 
-use super::{Geom, LokError, LokView, Reported, TILE_TWIPS, input::Input};
+use super::input::{Back, Input};
+use super::{Geom, LokError, LokView, Reported, TILE_TWIPS, Turn};
 use crate::{Doc, Tile, Worker};
 
 /// An input slower than this is logged as a warning.
@@ -24,7 +25,7 @@ pub(super) struct Job {
 /// What came back from the lane.
 enum Landed {
     /// Sequence, whether it edits, whether it switched part, outcome.
-    Input(u64, bool, bool, (io::Result<Option<String>>, Option<u64>)),
+    Input(u64, bool, bool, (io::Result<Option<Back>>, Option<u64>)),
     Tile(Job, io::Result<Tile>),
 }
 
@@ -111,7 +112,8 @@ impl LokView {
                     }
                     self.seen_revision(now.unwrap_or(0));
                     match outcome {
-                        Ok(Some(copied)) => self.copied = Some(copied),
+                        Ok(Some(Back::Copied(copied))) => self.copied = Some(copied),
+                        Ok(Some(Back::Turned(step))) => cx.emit(Turn(step)),
                         Ok(None) => {}
                         Err(error) => {
                             log::error!("lok: input failed ({:?})", error.kind());
diff --git a/crates/ely-lok/src/view/turn.rs b/crates/ely-lok/src/view/turn.rs
index 584b386..74a6ef1 100644
--- a/crates/ely-lok/src/view/turn.rs
+++ b/crates/ely-lok/src/view/turn.rs
@@ -5,6 +5,7 @@ use std::time::{Duration, Instant};
 use gpui::{Context, EventEmitter, Keystroke, Modifiers, ScrollDelta, ScrollWheelEvent, TouchPhase};
 
 use super::LokView;
+use super::input::{Input, vcl_key};
 
 /// Asks for the part `step` away from the shown one.
 #[derive(Clone, Copy, Debug, PartialEq)]
@@ -14,53 +15,90 @@ impl EventEmitter<Turn> for LokView {}
 
 /// Trackpad pixels one turn takes.
 const SWIPE: f32 = 50.0;
-/// A pause this long ends a trackpad gesture.
+/// A pause this long ends a gesture without phases.
 const PAUSE: Duration = Duration::from_millis(250);
 
+/// Lines one wheel notch scrolls on this platform.
+pub fn notch() -> f32 {
+    #[cfg(windows)]
+    {
+        use windows_sys::Win32::UI::WindowsAndMessaging::{SPI_GETWHEELSCROLLLINES, SystemParametersInfoW};
+        let mut lines = 3u32;
+        // Same setting gpui scales the wheel by.
+        unsafe { SystemParametersInfoW(SPI_GETWHEELSCROLLLINES, 0, (&raw mut lines).cast(), 0) };
+        lines as f32
+    }
+    #[cfg(target_os = "macos")]
+    {
+        1.0
+    }
+    // gpui's X11 and Wayland scroll three lines a notch.
+    #[cfg(not(any(windows, target_os = "macos")))]
+    {
+        3.0
+    }
+}
+
 /// The wheel's progress towards a turn.
 #[derive(Default)]
 pub(super) struct Turning {
-    lines: f32,
-    pixels: f32,
+    /// This gesture's travel, in turns.
+    travel: f32,
     /// This gesture already turned.
     spent: bool,
+    /// The platform began a gesture it has not ended.
+    held: bool,
+    /// Fractional lines: a smooth touchpad, not a wheel.
+    smooth: bool,
     last: Option<Instant>,
 }
 
 impl Turning {
     /// The turn a wheel event makes; 0 for none.
-    pub(super) fn wheel(&mut self, delta: ScrollDelta, phase: TouchPhase, now: Instant) -> i32 {
+    pub(super) fn wheel(&mut self, delta: ScrollDelta, phase: TouchPhase, now: Instant, notch: f32) -> i32 {
         let paused = self.last.is_none_or(|last| now.duration_since(last) >= PAUSE);
         self.last = Some(now);
-        let ahead = match delta {
-            // Each notch turns once.
+        let travel = match delta {
+            ScrollDelta::Lines(_) if notch <= 0.0 => return 0,
             ScrollDelta::Lines(lines) => {
-                if paused {
-                    self.lines = 0.0;
+                let notches = lines.y / notch;
+                let whole = notches.round();
+                // Whole notches outside a smooth stream: each turns once.
+                if whole != 0.0 && (notches - whole).abs() < 1e-3 && (paused || !self.smooth) {
+                    (self.travel, self.spent, self.smooth) = (0.0, false, false);
+                    return -(whole as i32);
                 }
-                self.lines += lines.y;
-                let whole = self.lines.trunc();
-                self.lines -= whole;
-                whole
+                if paused || !self.smooth {
+                    (self.travel, self.spent) = (0.0, false);
+                }
+                self.smooth = true;
+                notches
             }
-            // One trackpad gesture turns once, momentum included.
             ScrollDelta::Pixels(pixels) => {
-                if paused || phase == TouchPhase::Started {
-                    (self.pixels, self.spent) = (0.0, false);
+                self.smooth = false;
+                // Without phases, only a pause ends a gesture.
+                if phase == TouchPhase::Started || paused && !self.held {
+                    (self.travel, self.spent) = (0.0, false);
                 }
-                if self.spent {
-                    return 0;
-                }
-                self.pixels += f32::from(pixels.y);
-                if self.pixels.abs() < SWIPE {
-                    return 0;
-                }
-                self.spent = true;
-                self.pixels.signum()
+                self.held = match phase {
+                    TouchPhase::Started => true,
+                    TouchPhase::Ended | TouchPhase::Cancelled => false,
+                    TouchPhase::Moved => self.held,
+                };
+                f32::from(pixels.y) / SWIPE
             }
         };
+        // One gesture turns once, momentum included.
+        if self.spent {
+            return 0;
+        }
+        self.travel += travel;
+        if self.travel.abs() < 1.0 {
+            return 0;
+        }
+        self.spent = true;
         // Content moving down shows the part before.
-        -(ahead as i32)
+        -(self.travel.signum() as i32)
     }
 }
 
@@ -75,10 +113,9 @@ impl LokView {
         self.part
     }
 
-    /// Up and Down turn while nothing is picked or edited.
-    pub(super) fn turn_key(&mut self, keystroke: &Keystroke, cx: &mut Context<Self>) -> bool {
-        let idle = !self.caret() && self.graphic.is_none() && self.selection.is_empty();
-        if self.turning.is_none() || !idle || keystroke.modifiers != Modifiers::none() {
+    /// Queues Up, Down; the worker turns if nothing is picked.
+    pub(super) fn turn_key(&mut self, keystroke: &Keystroke) -> bool {
+        if self.turning.is_none() || keystroke.modifiers != Modifiers::none() {
             return false;
         }
         let step = match keystroke.key.as_str() {
@@ -86,7 +123,10 @@ impl LokView {
             "up" => -1,
             _ => return false,
         };
-        cx.emit(Turn(step));
+        let Some((char_code, key_code)) = vcl_key(keystroke) else {
+            return false;
+        };
+        self.send(Input::Turn { char_code, key_code, step });
         true
     }
 
@@ -99,7 +139,7 @@ impl LokView {
         let Some(turning) = self.turning.as_mut().filter(|_| whole) else {
             return false;
         };
-        let step = turning.wheel(event.delta, event.touch_phase, Instant::now());
+        let step = turning.wheel(event.delta, event.touch_phase, Instant::now(), notch());
         if step != 0 {
             cx.emit(Turn(step));
         }
@@ -113,30 +153,58 @@ mod tests {
 
     use super::{PAUSE, Turning};
 
+    const NOTCH: f32 = 3.0;
+
+    fn lines(y: f32) -> ScrollDelta {
+        ScrollDelta::Lines(point(0.0, y))
+    }
+
+    fn pixels(y: f32) -> ScrollDelta {
+        ScrollDelta::Pixels(point(px(0.0), px(y)))
+    }
+
     #[test]
     fn each_notch_turns_once() {
         let (mut turning, now) = (Turning::default(), std::time::Instant::now());
-        let notch = |y| ScrollDelta::Lines(point(0.0, y));
-        assert_eq!(turning.wheel(notch(-1.0), TouchPhase::Moved, now), 1);
-        assert_eq!(turning.wheel(notch(-1.0), TouchPhase::Moved, now), 1);
-        assert_eq!(turning.wheel(notch(1.0), TouchPhase::Moved, now), -1);
-        assert_eq!(turning.wheel(notch(0.5), TouchPhase::Moved, now), 0);
-        assert_eq!(turning.wheel(notch(0.5), TouchPhase::Moved, now), -1);
+        let mut wheel = |y| turning.wheel(lines(y), TouchPhase::Moved, now, NOTCH);
+        assert_eq!(wheel(-3.0), 1, "Windows and Linux scroll three lines a notch");
+        assert_eq!(wheel(-3.0), 1);
+        assert_eq!(wheel(3.0), -1);
+        assert_eq!(wheel(-6.0), 2, "two notches in one event");
+        let mut mac = Turning::default();
+        assert_eq!(mac.wheel(lines(-1.0), TouchPhase::Moved, now, 1.0), 1);
+    }
+
+    #[test]
+    fn smooth_lines_turn_once_a_gesture() {
+        let (mut turning, now) = (Turning::default(), std::time::Instant::now());
+        // An X11 or Windows touchpad: fractions, no phases.
+        let turned: i32 = (0..30).map(|_| turning.wheel(lines(-0.4), TouchPhase::Moved, now, NOTCH)).sum();
+        assert_eq!(turned, 1, "one swipe turns once");
+        assert_eq!(turning.wheel(lines(-3.0), TouchPhase::Moved, now, NOTCH), 0, "a whole step mid-swipe");
+        let later = now + PAUSE;
+        assert_eq!(turning.wheel(lines(-3.0), TouchPhase::Moved, later, NOTCH), 1, "a pause ends the swipe");
     }
 
     #[test]
     fn a_swipe_turns_once_until_the_next() {
         let (mut turning, now) = (Turning::default(), std::time::Instant::now());
-        let swipe = |y| ScrollDelta::Pixels(point(px(0.0), px(y)));
-        assert_eq!(turning.wheel(swipe(-30.0), TouchPhase::Started, now), 0);
-        assert_eq!(turning.wheel(swipe(-30.0), TouchPhase::Moved, now), 1);
+        let mut swipe = |y, phase, at| turning.wheel(pixels(y), phase, at, NOTCH);
+        assert_eq!(swipe(-30.0, TouchPhase::Started, now), 0);
+        assert_eq!(swipe(-30.0, TouchPhase::Moved, now), 1);
+        // A pause with fingers down is the same gesture.
+        assert_eq!(swipe(-60.0, TouchPhase::Moved, now + PAUSE * 2), 0);
+        assert_eq!(swipe(0.0, TouchPhase::Ended, now + PAUSE * 2), 0);
         // Momentum after the turn turns nothing more.
         for _ in 0..20 {
-            assert_eq!(turning.wheel(swipe(-80.0), TouchPhase::Moved, now), 0);
+            assert_eq!(swipe(-80.0, TouchPhase::Moved, now + PAUSE * 2), 0);
         }
-        assert_eq!(turning.wheel(swipe(60.0), TouchPhase::Started, now), -1);
-        // A pause ends a gesture without phases.
-        let later = now + PAUSE;
-        assert_eq!(turning.wheel(swipe(60.0), TouchPhase::Moved, later), -1);
+        assert_eq!(swipe(60.0, TouchPhase::Started, now + PAUSE * 2), -1);
+        assert_eq!(swipe(0.0, TouchPhase::Ended, now + PAUSE * 2), 0);
+        // Without phases a pause ends a gesture (Wayland).
+        let later = now + PAUSE * 4;
+        assert_eq!(swipe(60.0, TouchPhase::Moved, later), -1);
+        assert_eq!(swipe(60.0, TouchPhase::Moved, later), 0);
+        assert_eq!(swipe(60.0, TouchPhase::Moved, later + PAUSE), -1);
     }
 }
diff --git a/crates/ely-lok/src/worker.rs b/crates/ely-lok/src/worker.rs
index ea5446b..be36349 100644
--- a/crates/ely-lok/src/worker.rs
+++ b/crates/ely-lok/src/worker.rs
@@ -218,6 +218,7 @@ fn answer(lok: &Lok, tag: u8, id: u64, payload: &[u8]) {
             }
         }),
         tag::POST_KEY => input::key(unpack),
+        tag::TURN_KEY => input::turn_key(unpack),
         tag::POST_MOUSE => input::mouse(unpack),
         tag::GRAPHIC => input::graphic(unpack),
         tag::POST_TEXT => input::text(unpack),
diff --git a/crates/ely-lok/src/worker/input.rs b/crates/ely-lok/src/worker/input.rs
index 4c42314..0ca6991 100644
--- a/crates/ely-lok/src/worker/input.rs
+++ b/crates/ely-lok/src/worker/input.rs
@@ -99,6 +99,20 @@ pub(super) fn key(unpack: &mut Unpack) -> io::Result<Vec<u8>> {
     Ok(Vec::new())
 }
 
+/// Up or Down after earlier input: 1 if it turns.
+pub(super) fn turn_key(unpack: &mut Unpack) -> io::Result<Vec<u8>> {
+    let (id, char_code, key_code) = (unpack.u64()?, unpack.i64()?, unpack.i64()?);
+    // Earlier input's callbacks already landed here.
+    if !crate::events::picked(id) {
+        return Ok(Pack::new().u64(1).bytes());
+    }
+    with_doc(id, |doc| {
+        doc.post_key(0, char_code as i32, key_code as i32);
+        doc.post_key(1, char_code as i32, key_code as i32);
+    })?;
+    Ok(Pack::new().u64(0).bytes())
+}
+
 /// One mouse event: kind, x, y, count, buttons, modifiers.
 pub(super) fn mouse(unpack: &mut Unpack) -> io::Result<Vec<u8>> {
     let id = unpack.u64()?;
diff --git a/crates/ely-lok/src/worker/revision.rs b/crates/ely-lok/src/worker/revision.rs
index 9888a05..4f0c1c4 100644
--- a/crates/ely-lok/src/worker/revision.rs
+++ b/crates/ely-lok/src/worker/revision.rs
@@ -51,7 +51,7 @@ pub fn expect(unpack: &mut Unpack) -> io::Result<Vec<u8>> {
 pub fn bump(request: u8, payload: &[u8]) {
     let changes = matches!(
         request,
-        tag::POST_KEY | tag::POST_MOUSE | tag::GRAPHIC | tag::POST_TEXT | tag::POST_UNO | tag::PASTE | tag::CUT | tag::COMPLETE_FUNCTION
+        tag::POST_KEY | tag::TURN_KEY | tag::POST_MOUSE | tag::GRAPHIC | tag::POST_TEXT | tag::POST_UNO | tag::PASTE | tag::CUT | tag::COMPLETE_FUNCTION
     );
     let mut unpack = Unpack::new(payload);
     let Ok(id) = unpack.u64() else {
diff --git a/tasks/TASKS.md b/tasks/TASKS.md
index 523f1c7..6e6f8be 100644
--- a/tasks/TASKS.md
+++ b/tasks/TASKS.md
@@ -271,5 +271,5 @@
 - [x] R6.11 Windows 升级后旧文件仍在（R6.10 本机重装查出）：安装程序只覆盖不删除，旧版 ElyMark 的 `git` 与 CEF 文件留在安装目录；安装程序记下所装的文件，升级与卸载只移去这些；文件被占用即什么也不改，失败时放回旧版。第 3 轮后（最后一轮，修完不再审查）：备份按清单次序编号，近 260 字的路径照样升级与卸载；卸载先查清单本身，删不掉即放回全部
 - [x] R6.10 重发 0.1.5（用户定：仍为 0.1.5）：删去 v0.1.5 的全部文件，标签移到修复的提交，三端全部包重建并上传，本机重装（标签在 53630ce；推标签即起发布流程，其 Windows 与 Linux 任务建出并上传，与本机同时起的 Windows 构建撞上，本机那份未上传；macOS 任务未上传，dmg 由 Mac mini 本机建、公证、钉票；44 个文件，同名的源码包只留 Linux 的一份，见 P3-16；下载回的 ElyMark 安装程序与清单的散列与构建相同；本机六个应用 0.1.5 经新安装程序升级，ElyMark 目录无 `git`，冒烟启动均正常退出、日志无警告）
 - [x] R6.12 macOS 打开一个文档，程序坞里 ElyDoc、ElyTable、ElyShow 各出现两个图标（用户 2026-10-15 报）：LOK worker 在应用包内启动 AppKit，系统按包的 Info.plist 把它也登记为常规应用（`lsappinfo` 两个 Foreground）；worker 在内核启动 AppKit 前把本进程主包信息的 `LSUIElement` 设为真，登记即为辅助应用，钩子后核对策略（第 1 轮：原先登记后才改，15 次有 11 次先为 Foreground）；`tests/scripts/dock-macos.sh` 在 Mac mini 上 30 次启动全为 UIElement，旧 worker 即失败；第 2 轮：包外的 worker（`cargo run`、单测）策略为禁止，原核对即退出，改设辅助，测试另启包外的开发构建（40 次全过）；第 3 轮通过
-- [ ] R6.13 ElyShow 编辑区的滚轮与上下键不换页（用户报，三端；放映时正常）：内核在未选中对象时把上下键当作滚动窗口，Ely 的画布整页适合、无处可滚；整页可见时滚轮换页（每格一页，触控板一次手势一页），未选中对象、未编辑文字时上下键换页，同缩略图条的路径，到首末页即停
+- [ ] R6.13 ElyShow 编辑区的滚轮与上下键不换页（用户报，三端；放映时正常）：内核在未选中对象时把上下键当作滚动窗口，Ely 的画布整页适合、无处可滚；整页可见时滚轮换页（每格一页，触控板一次手势一页），未选中对象、未编辑文字时上下键换页，同缩略图条的路径，到首末页即停；第 1 轮：Windows 一格三行原换三页，X11 触控板的小数行一次滑动换多页，按住手指停顿后再滑又换一页，Tab 后紧接的 Down 按旧状态换页；改为按平台每格行数计格、小数行与像素按手势计、有起止的手势只到结束才算完、上下键由 worker 按输入次序判定
 - [ ] R6.14 重发 0.1.5（用户定：仍为 0.1.5，全部重建并重传）：删去 v0.1.5 的全部文件，标签移到 R6.12、R6.13 的提交，三端全部包重建并上传，本机重装
diff --git a/tasks/reviews/R6.13-r1.md b/tasks/reviews/R6.13-r1.md
new file mode 100644
index 0000000..246012c
--- /dev/null
+++ b/tasks/reviews/R6.13-r1.md
@@ -0,0 +1,9 @@
+FAIL
+
+- crates/ely-lok/src/view/turn.rs:41 — Logical scroll lines are counted as physical wheel notches. Windows multiplies each notch by the system scroll-line setting (`vendor/gpui-pre-windows/src/events.rs:589`); with three lines configured, one downward notch produces `Lines(0, -3)`. Replaying that event through ElyShow and the rebuilt LOK worker moved from slide 1 to slide 4, rather than slide 2 (`.work/R6.13-r1/probe-explicit.log`). The pinned Linux X11 backend also uses three lines per notch. Normalize platform wheel units before counting slide changes, and cover realistic platform deltas; the existing tests only exercise unit notches.
+
+- crates/ely-lok/src/view/turn.rs:37 — The line-delta branch never applies the one-turn-per-gesture limit, but the pinned GPUI X11 backend also represents smooth touchpad scrolling as `ScrollDelta::Lines` (`gpui-pre-linux-0.3.8`, `x11/client.rs`, `get_scroll_delta_and_update_state` and `make_scroll_wheel_event`). Replaying ten consecutive `-0.4` line deltas in one UI update through ElyShow/LOK moved from slide 1 to slide 5 instead of slide 2 (`.work/R6.13-r1/probe-extra.log`). Preserve the distinction between discrete wheel steps and smooth XInput gestures in the input adapter, and apply gesture limiting to the latter; clamping each event individually would still turn repeatedly during one swipe.
+
+- crates/ely-lok/src/view/turn.rs:48 — A 250 ms pause resets `spent` even when the platform reports continuation of the same gesture. With a fitted deck, a `Started` event of -60 pixels turns one slide; keeping fingers down, pausing 300 ms, then sending a `Moved` event of -60 pixels turns another. This reproduced through ElyShow/LOK with slide index 2 instead of 1 (`.work/R6.13-r1/probe-explicit.log`). Track explicit gesture lifetime when phases are available; elapsed time must not reopen an explicitly ongoing gesture. Reserve timeout inference for streams without gesture boundaries and test continuation after a pause.
+
+- crates/ely-lok/src/view/turn.rs:80 — The arrow-key decision uses the last selection callback without accounting for earlier queued input. On a title slide, press Tab to select its placeholder and Down before the worker's selection callback arrives: Down emits `Turn`, so the queued Tab selects the object and the following part change leaves the slide instead of moving that object. The integration probe changed slide index 0 to 1; its control case, waiting for Tab's selection before Down, stayed on slide 0 (`.work/R6.13-r1/probe-extra.log`). Resolve the arrow's action against the selection/editing state after preceding inputs and their callbacks have landed, while preserving input order, and add this queued-input regression.