feat(editor): add toggle case shortcut for selection

apps/desktop/src/components/editor/EditorSettingsDialog.vue

@@ -2124,6 +2124,7 @@ const formatterEditorShortcutIds: ShortcutActionId[] = [
   "selectAll",
   "uppercaseSelection",
   "lowercaseSelection",
+  "toggleCaseSelection",
   "toggleFold",
   "foldAll",
   "unfoldAll",

apps/desktop/src/components/editor/QueryEditor.vue

@@ -1396,6 +1396,7 @@ function runKeymapExtension(codeMirrorKeymap: (typeof import("@codemirror/view")
         ...binding(shortcuts.selectAllSelectionOccurrences, selectAllQueryEditorSelectionOccurrences),
         ...createQueryEditorSelectionCaseShortcutBindings(shortcuts.uppercaseSelection, () => convertSelectedSqlCase("upper")),
         ...createQueryEditorSelectionCaseShortcutBindings(shortcuts.lowercaseSelection, () => convertSelectedSqlCase("lower")),
+        ...createQueryEditorSelectionCaseShortcutBindings(shortcuts.toggleCaseSelection, () => convertSelectedSqlCase("toggle")),
         ...createQueryEditorSelectionCaseShortcutBindings(shortcuts.convertNamingStyle, () => convertSelectedNamingStyle()),
         ...binding(shortcuts.toggleLineComment, (view) => codeMirrorRuntime.codeMirrorToggleLineComment?.(view) ?? false),
         ...binding(shortcuts.toggleBlockComment, (view) => {

apps/desktop/src/components/editor/QueryEditorContextMenu.vue

@@ -3,6 +3,7 @@ import { computed } from "vue";
 import { useI18n } from "vue-i18n";
 import {
   AlignLeft,
+  ArrowDownUp,
   Camera,
   CaseLower,
   CaseSensitive,
@@ -39,6 +40,7 @@ import { supportsQueryEditorBlockComments } from "@/lib/database/databaseFeature
 import { normalizeShortcutSettings, type ShortcutSettings } from "@/lib/editor/shortcutRegistry";
 import { queryContextObjectActions, type QueryContextObjectAction } from "@/lib/sql/queryCursorTableTarget";
 import type { SqlObjectNavigationTarget } from "@/lib/sql/sqlNavigation";
+import type { SqlSelectionCaseMode } from "@/lib/sql/sqlSelectionCase";
 import type { QueryEditorProps } from "./queryEditorTypes";
 
 export interface QueryEditorContextMenuState {
@@ -70,7 +72,7 @@ export interface QueryEditorContextMenuActions {
   cutSelectedSqlFromContextMenu: () => void;
   pasteClipboardSqlFromContextMenu: () => void;
   pasteClipboardSqlRestoringSource: () => void;
-  convertSelectedSqlCase: (mode: "upper" | "lower") => void;
+  convertSelectedSqlCase: (mode: SqlSelectionCaseMode) => void;
   convertSelectedNamingStyle: () => void;
   openDelimitedListDialog: () => void;
   addNextSelectionOccurrenceFromContextMenu: () => void;
@@ -300,6 +302,13 @@ const contextMenuItems = computed<ContextMenuItem[]>(() => {
       icon: Sparkles,
       shortcut: shortcuts.sendSelectionToAi,
     },
+    {
+      label: t("editor.contextMenu.toggleCaseSelection"),
+      action: () => actions.convertSelectedSqlCase("toggle"),
+      disabled: !canCopySelectedSql,
+      icon: ArrowDownUp,
+      shortcut: shortcuts.toggleCaseSelection,
+    },
     {
       label: t("editor.contextMenu.uppercaseSelection"),
       action: () => actions.convertSelectedSqlCase("upper"),

apps/desktop/src/i18n/locales/az.ts

@@ -1505,6 +1505,7 @@ export default withEnglishFallback({
       pasteRestoringSourceSql: "Yapışdır və mənbə SQL-i bərpa et",
       pasteClipboardReadFailed: "Mübadilə buferini oxumaq mümkün olmadı: {message}",
       sendToAi: "Süni intellektə göndər",
+      toggleCaseSelection: "Registri dəyiş",
       uppercaseSelection: "Böyük hərflərə çevir",
       lowercaseSelection: "Kiçik hərflərə çevir",
       convertNamingStyle: "Adlandırma üslubunu dəyiş",
@@ -8222,6 +8223,7 @@ export default withEnglishFallback({
     changelogSectionRemoved: "Çıxarılanlar",
     shortcutUppercaseSelection: "Seçimi böyük hərflərə çevir",
     shortcutLowercaseSelection: "Seçimi kiçik hərflərə çevir",
+    shortcutToggleCaseSelection: "Seçimin hərf registrini dəyiş",
     shortcutConvertNamingStyle: "Adlandırma üslubunu dəyiş",
     shortcutExPasteSqlInCondition: "ExPaste: IN şərti kimi yerləşdir",
   },

apps/desktop/src/i18n/locales/en.ts

@@ -1802,6 +1802,7 @@ export default {
       pasteRestoringSourceSql: "Paste and restore source SQL",
       pasteClipboardReadFailed: "Failed to read clipboard: {message}",
       sendToAi: "Send to AI",
+      toggleCaseSelection: "Toggle case",
       uppercaseSelection: "Convert to uppercase",
       lowercaseSelection: "Convert to lowercase",
       convertNamingStyle: "Toggle naming style",
@@ -9163,6 +9164,7 @@ export default {
     changelogSectionRemoved: "Removed",
     shortcutUppercaseSelection: "Convert selection to uppercase",
     shortcutLowercaseSelection: "Convert selection to lowercase",
+    shortcutToggleCaseSelection: "Toggle selection case",
     shortcutConvertNamingStyle: "Toggle naming style",
     shortcutExPasteSqlInCondition: "ExPaste: paste as IN condition",
   },

apps/desktop/src/i18n/locales/es.ts

@@ -1787,6 +1787,7 @@ export default withEnglishFallback({
       foldAll: "Contraer todo",
       unfoldAll: "Expandir todo",
       sendToAi: "Enviar a IA",
+      toggleCaseSelection: "Alternar mayúsculas/minúsculas",
       uppercaseSelection: "Convertir a mayusculas",
       lowercaseSelection: "Convertir a minusculas",
       selectAll: "Seleccionar todo",
@@ -8460,6 +8461,7 @@ export default withEnglishFallback({
     changelogSectionRemoved: "Eliminado",
     shortcutUppercaseSelection: "Convertir selección a mayúsculas",
     shortcutLowercaseSelection: "Convertir selección a minúsculas",
+    shortcutToggleCaseSelection: "Alternar mayúsculas y minúsculas de la selección",
     shortcutExPasteSqlInCondition: "ExPaste: pegar como condición IN",
     dateTimeSection: "Fecha y hora",
     globalDateTimeDisplayFormat: "Formato de visualización global",

apps/desktop/src/i18n/locales/id.ts

@@ -1740,6 +1740,7 @@ export default withEnglishFallback({
       pasteRestoringSourceSql: "Tempel dan pulihkan SQL sumber",
       pasteClipboardReadFailed: "Gagal membaca clipboard: {message}",
       sendToAi: "Kirim ke AI",
+      toggleCaseSelection: "Alihkan huruf besar/kecil",
       uppercaseSelection: "Konversi ke huruf besar",
       lowercaseSelection: "Konversi ke huruf kecil",
       convertNamingStyle: "Alihkan gaya penamaan",
@@ -8956,6 +8957,7 @@ export default withEnglishFallback({
     changelogSectionRemoved: "Dihapus",
     shortcutUppercaseSelection: "Ubah seleksi menjadi huruf besar",
     shortcutLowercaseSelection: "Ubah seleksi menjadi huruf kecil",
+    shortcutToggleCaseSelection: "Alihkan huruf besar/kecil seleksi",
     shortcutConvertNamingStyle: "Alihkan gaya penamaan",
     shortcutExPasteSqlInCondition: "ExPaste: tempel sebagai kondisi IN",
   },

apps/desktop/src/i18n/locales/it.ts

@@ -1696,6 +1696,7 @@ export default withEnglishFallback({
       foldAll: "Comprimi tutto",
       unfoldAll: "Espandi tutto",
       sendToAi: "Invia ad AI",
+      toggleCaseSelection: "Inverti maiuscole/minuscole",
       uppercaseSelection: "Converti in maiuscolo",
       lowercaseSelection: "Converti in minuscolo",
       selectAll: "Seleziona tutto",
@@ -8206,6 +8207,7 @@ export default withEnglishFallback({
     changelogSectionRemoved: "Rimossi",
     shortcutUppercaseSelection: "Converti selezione in maiuscolo",
     shortcutLowercaseSelection: "Converti selezione in minuscolo",
+    shortcutToggleCaseSelection: "Inverti maiuscole/minuscole della selezione",
     shortcutExPasteSqlInCondition: "ExPaste: incolla come condizione IN",
     dateTimeSection: "Data e Ora",
     globalDateTimeDisplayFormat: "Formato di visualizzazione globale",

apps/desktop/src/i18n/locales/ja.ts

@@ -1716,6 +1716,7 @@ export default withEnglishFallback({
       foldAll: "すべて折りたたむ",
       unfoldAll: "すべて展開",
       sendToAi: "AIに送信",
+      toggleCaseSelection: "大文字/小文字を切り替え",
       uppercaseSelection: "大文字に変換",
       lowercaseSelection: "小文字に変換",
       selectAll: "すべて選択",
@@ -8222,6 +8223,7 @@ export default withEnglishFallback({
     changelogSectionRemoved: "削除",
     shortcutUppercaseSelection: "選択範囲を大文字に変換",
     shortcutLowercaseSelection: "選択範囲を小文字に変換",
+    shortcutToggleCaseSelection: "選択範囲の大文字/小文字を切り替え",
     shortcutExPasteSqlInCondition: "ExPaste: IN条件として貼り付け",
     dateTimeSection: "日付と時刻",
     globalDateTimeDisplayFormat: "グローバル表示形式",

apps/desktop/src/i18n/locales/ko.ts

@@ -1627,6 +1627,7 @@ export default withEnglishFallback({
       pasteRestoringSourceSql: "붙여넣고 소스 SQL 복원",
       pasteClipboardReadFailed: "클립보드 읽기 실패: {message}",
       sendToAi: "AI로 보내기",
+      toggleCaseSelection: "대소문자 전환",
       uppercaseSelection: "대문자로 변환",
       lowercaseSelection: "소문자로 변환",
       delimitedList: "구분자 목록으로 변환",
@@ -8012,6 +8013,7 @@ export default withEnglishFallback({
     changelogSectionRemoved: "제거된 항목",
     shortcutUppercaseSelection: "선택 영역을 대문자로 변환",
     shortcutLowercaseSelection: "선택 영역을 소문자로 변환",
+    shortcutToggleCaseSelection: "선택 영역 대소문자 전환",
     shortcutExPasteSqlInCondition: "ExPaste: IN 조건으로 붙여넣기",
     shortcutToggleFold: "접기/펼치기",
     shortcutFoldAll: "모두 접기",

apps/desktop/src/i18n/locales/pt-BR.ts

@@ -1697,6 +1697,7 @@ export default withEnglishFallback({
       foldAll: "Recolher tudo",
       unfoldAll: "Expandir tudo",
       sendToAi: "Enviar para IA",
+      toggleCaseSelection: "Alternar maiúsculas/minúsculas",
       uppercaseSelection: "Converter para maiúsculas",
       lowercaseSelection: "Converter para minúsculas",
       selectAll: "Selecionar tudo",
@@ -8207,6 +8208,7 @@ export default withEnglishFallback({
     changelogSectionRemoved: "Removido",
     shortcutUppercaseSelection: "Converter seleção em maiúsculas",
     shortcutLowercaseSelection: "Converter seleção em minúsculas",
+    shortcutToggleCaseSelection: "Alternar maiúsculas/minúsculas da seleção",
     shortcutExPasteSqlInCondition: "ExPaste: colar como condição IN",
     dateTimeSection: "Data e Hora",
     globalDateTimeDisplayFormat: "Formato de exibição global",

apps/desktop/src/i18n/locales/ru.ts

@@ -1710,6 +1710,7 @@ export default withEnglishFallback({
       pasteRestoringSourceSql: "Вставить и восстановить SQL из кода",
       pasteClipboardReadFailed: "Не удалось прочитать буфер обмена: {message}",
       sendToAi: "Отправить в AI",
+      toggleCaseSelection: "Переключить регистр",
       uppercaseSelection: "Преобразовать в верхний регистр",
       lowercaseSelection: "Преобразовать в нижний регистр",
       convertNamingStyle: "Переключить стиль именования",
@@ -9465,6 +9466,7 @@ export default withEnglishFallback({
     changelogSectionRemoved: "Удалено",
     shortcutUppercaseSelection: "Преобразовать выделенное в верхний регистр",
     shortcutLowercaseSelection: "Преобразовать выделенное в нижний регистр",
+    shortcutToggleCaseSelection: "Переключить регистр выделенного",
     shortcutConvertNamingStyle: "Переключить стиль именования",
     shortcutExPasteSqlInCondition: "ExPaste: вставить как условие IN",
     showColumnHeaderTooltips: "Всплывающие подсказки при наведении на имена полей",

apps/desktop/src/i18n/locales/tr.ts

@@ -1505,6 +1505,7 @@ export default withEnglishFallback({
       pasteRestoringSourceSql: "Yapıştır ve kaynak SQL'i geri yükle",
       pasteClipboardReadFailed: "Pano okunamadı: {message}",
       sendToAi: "Yapay Zekâya Gönder",
+      toggleCaseSelection: "Büyük/küçük harf değiştir",
       uppercaseSelection: "Büyük harfe dönüştür",
       lowercaseSelection: "Küçük harfe dönüştür",
       delimitedList: "Ayırıcılı listeye dönüştür",
@@ -8096,6 +8097,7 @@ export default withEnglishFallback({
     changelogSectionRemoved: "Kaldırıldı",
     shortcutUppercaseSelection: "Seçimi büyük harfe dönüştür",
     shortcutLowercaseSelection: "Seçimi küçük harfe dönüştür",
+    shortcutToggleCaseSelection: "Seçimin büyük/küçük harf durumunu değiştir",
     shortcutExPasteSqlInCondition: "ExPaste: IN koşulu olarak yapıştır",
   },
   driverStore: {

apps/desktop/src/i18n/locales/zh-CN.ts

@@ -1738,6 +1738,7 @@ export default withEnglishFallback({
       pasteRestoringSourceSql: "粘贴并还原源码 SQL",
       pasteClipboardReadFailed: "读取剪贴板失败：{message}",
       sendToAi: "发送到 AI",
+      toggleCaseSelection: "切换大小写",
       uppercaseSelection: "转为大写",
       lowercaseSelection: "转为小写",
       convertNamingStyle: "切换命名风格",
@@ -8624,6 +8625,7 @@ export default withEnglishFallback({
     shortcutExtendSelection: "扩展选择",
     shortcutUppercaseSelection: "选中内容转为大写",
     shortcutLowercaseSelection: "选中内容转为小写",
+    shortcutToggleCaseSelection: "切换选中内容大小写",
     shortcutConvertNamingStyle: "切换命名风格",
     shortcutExPasteSqlInCondition: "ExPaste：粘贴为 IN 条件",
     shortcutEditTableStructure: "编辑表结构",

apps/desktop/src/i18n/locales/zh-TW.ts

@@ -1700,6 +1700,7 @@ export default withEnglishFallback({
       foldAll: "全部折疊",
       unfoldAll: "全部展開",
       sendToAi: "傳送至 AI",
+      toggleCaseSelection: "切換大小寫",
       uppercaseSelection: "轉為大寫",
       lowercaseSelection: "轉為小寫",
       selectAll: "全選",
@@ -7573,6 +7574,7 @@ export default withEnglishFallback({
     queryExportKeysetOptimizationEnabledDescription: "僅適用於可安全識別的單表查詢；複雜查詢會自動回退。",
     shortcutUppercaseSelection: "選取內容轉為大寫",
     shortcutLowercaseSelection: "選取內容轉為小寫",
+    shortcutToggleCaseSelection: "切換選取內容大小寫",
     shortcutExPasteSqlInCondition: "ExPaste：貼上為 IN 條件",
     routineSourceOpenMode: "函式/程序/檢視開啟方式",
     routineSourceOpenModeQueryTab: "資料標籤頁",

apps/desktop/src/lib/__tests__/editor/shortcutRegistry.spec.ts

@@ -41,6 +41,7 @@ describe("shortcutRegistry editor actions", () => {
     "selectAllSelectionOccurrences",
     "uppercaseSelection",
     "lowercaseSelection",
+    "toggleCaseSelection",
     "exPasteSqlInCondition",
     "toggleFold",
     "foldAll",
@@ -292,6 +293,7 @@ describe("shortcutRegistry editor actions", () => {
     expect(shortcuts.selectAllSelectionOccurrences).toBe(selectionOccurrenceDefaultShortcut("selectAllSelectionOccurrences"));
     expect(shortcuts.uppercaseSelection).toBe("Shift+Alt+U");
     expect(shortcuts.lowercaseSelection).toBe("Shift+Alt+L");
+    expect(shortcuts.toggleCaseSelection).toBe("Mod+Shift+U");
     expect(shortcuts.exPasteSqlInCondition).toBe("");
     expect(shortcuts.toggleFold).toBe("Mod+.");
     expect(shortcuts.foldAll).toBe(foldAllDefaultShortcut("foldAll"));
@@ -308,6 +310,13 @@ describe("shortcutRegistry editor actions", () => {
     expect(normalizeShortcutSettings({ foldAll: "", unfoldAll: "" }, "Win32")).toMatchObject({ foldAll: "", unfoldAll: "" });
   });
 
+  it("registers toggle case as a configurable editor shortcut (#5085)", () => {
+    const definition = SHORTCUT_DEFINITIONS.find((item) => item.id === "toggleCaseSelection");
+
+    expect(definition).toMatchObject({ scope: "editor", defaultShortcut: "Mod+Shift+U", labelKey: "settings.shortcutToggleCaseSelection" });
+    expect(DEFAULT_SHORTCUT_SETTINGS.toggleCaseSelection).toBe("Mod+Shift+U");
+  });
+
   it("registers IntelliJ-style extend selection as a configurable editor shortcut", () => {
     const definition = SHORTCUT_DEFINITIONS.find((item) => item.id === "extendSelection");
 

apps/desktop/src/lib/__tests__/sql/sqlSelectionCase.spec.ts

@@ -98,4 +98,51 @@ describe("convertSqlSelectionCase", () => {
 
     expect(convertSqlSelectionCase(sql, { from, to: sql.length }, "upper")).toBe("> 60 AND GRADE = 'AbC'");
   });
+
+  describe("toggle mode (#5085)", () => {
+    it("converts lowercase text to uppercase", () => {
+      const sql = "select id, name from users";
+      expect(convertSqlSelectionCase(sql, { from: 0, to: sql.length }, "toggle")).toBe("SELECT ID, NAME FROM USERS");
+    });
+
+    it("defaults mixed case to uppercase first", () => {
+      const sql = "Select id, userName From Users";
+      expect(convertSqlSelectionCase(sql, { from: 0, to: sql.length }, "toggle")).toBe("SELECT ID, USERNAME FROM USERS");
+    });
+
+    it("converts all-uppercase text to lowercase", () => {
+      const sql = "SELECT ID, NAME FROM USERS";
+      expect(convertSqlSelectionCase(sql, { from: 0, to: sql.length }, "toggle")).toBe("select id, name from users");
+    });
+
+    it("cycles between uppercase and lowercase on repeated toggles", () => {
+      const initial = "Select Name From Users";
+      const first = convertSqlSelectionCase(initial, { from: 0, to: initial.length }, "toggle");
+      expect(first).toBe("SELECT NAME FROM USERS");
+
+      const second = convertSqlSelectionCase(first, { from: 0, to: first.length }, "toggle");
+      expect(second).toBe("select name from users");
+
+      const third = convertSqlSelectionCase(second, { from: 0, to: second.length }, "toggle");
+      expect(third).toBe("SELECT NAME FROM USERS");
+    });
+
+    it("protects string literals when toggling case", () => {
+      const sql = "select name from users where status = 'active'";
+      const upper = convertSqlSelectionCase(sql, { from: 0, to: sql.length }, "toggle");
+      expect(upper).toBe("SELECT NAME FROM USERS WHERE STATUS = 'active'");
+
+      const lower = convertSqlSelectionCase(upper, { from: 0, to: upper.length }, "toggle");
+      expect(lower).toBe("select name from users where status = 'active'");
+    });
+
+    it("toggles bare string literals when selected directly", () => {
+      const sql = "('first', 'second')";
+      const upper = convertSqlSelectionCase(sql, { from: 0, to: sql.length }, "toggle");
+      expect(upper).toBe("('FIRST', 'SECOND')");
+
+      const lower = convertSqlSelectionCase(upper, { from: 0, to: upper.length }, "toggle");
+      expect(lower).toBe("('first', 'second')");
+    });
+  });
 });

apps/desktop/src/lib/editor/shortcutRegistry.ts

@@ -29,6 +29,7 @@ export type ShortcutActionId =
   | "selectAllSelectionOccurrences"
   | "uppercaseSelection"
   | "lowercaseSelection"
+  | "toggleCaseSelection"
   | "convertNamingStyle"
   | "exPasteSqlInCondition"
   | "toggleFold"
@@ -330,6 +331,12 @@ export const SHORTCUT_DEFINITIONS: ShortcutDefinition[] = [
     scope: "editor",
     defaultShortcut: "Shift+Alt+L",
   },
+  {
+    id: "toggleCaseSelection",
+    labelKey: "settings.shortcutToggleCaseSelection",
+    scope: "editor",
+    defaultShortcut: "Mod+Shift+U",
+  },
   {
     id: "convertNamingStyle",
     labelKey: "settings.shortcutConvertNamingStyle",

apps/desktop/src/lib/sql/sqlSelectionCase.ts

@@ -1,19 +1,27 @@
 import { tokenizeSqlSemantic } from "@/lib/sql/semantic/tokens";
 
-export type SqlSelectionCaseMode = "upper" | "lower";
+export type SqlSelectionCaseMode = "upper" | "lower" | "toggle";
 
 type SqlSelectionRange = {
   from: number;
   to: number;
 };
 
-function convertCase(text: string, mode: SqlSelectionCaseMode): string {
+function convertCase(text: string, mode: "upper" | "lower"): string {
   return mode === "upper" ? text.toUpperCase() : text.toLowerCase();
 }
 
 export function convertSqlSelectionCase(sql: string, range: SqlSelectionRange, mode: SqlSelectionCaseMode, dialectId?: "mysql" | "postgres" | "sqlserver"): string {
   const from = Math.max(0, Math.min(range.from, sql.length));
   const to = Math.max(from, Math.min(range.to, sql.length));
+  if (mode === "toggle") {
+    const upperResult = convertSqlSelectionCase(sql, range, "upper", dialectId);
+    const currentText = sql.slice(from, to);
+    if (upperResult !== currentText) {
+      return upperResult;
+    }
+    return convertSqlSelectionCase(sql, range, "lower", dialectId);
+  }
   const protectedTokens = tokenizeSqlSemantic(sql, dialectId).filter((item) => {
     if (item.span.end <= from || item.span.start >= to) return false;
     if (item.kind === "string") return true;

docs/content/docs/keyboard-shortcuts.cn.mdx

@@ -24,6 +24,7 @@ DBX 的快捷键来自同一份可配置 action registry。**设置 → 快捷
 | `Shift+Mod+K` | 删除当前行 |
 | `Alt+↑` / `Alt+↓` | 上下移动当前行 |
 | `Shift+Alt+↑` / `Shift+Alt+↓` | 向上/下复制当前行 |
+| `Mod+Shift+U` | 切换选中内容大小写（首次默认转为大写） |
 | `Shift+Alt+U` / `Shift+Alt+L` | 选中内容转大写/小写 |
 | `Shift+Alt+C` | 切换选中内容的命名风格（camelCase → PascalCase → snake_case → SCREAMING_SNAKE_CASE → kebab-case） |
 | `Mod+.` | 折叠或展开代码块 |

docs/content/docs/keyboard-shortcuts.mdx

@@ -24,6 +24,7 @@ DBX shortcuts come from one configurable action registry. **Settings → Shortcu
 | `Shift+Mod+K` | Delete current line |
 | `Alt+↑` / `Alt+↓` | Move current line up/down |
 | `Shift+Alt+↑` / `Shift+Alt+↓` | Copy current line up/down |
+| `Mod+Shift+U` | Toggle selection case (defaults to uppercase first) |
 | `Shift+Alt+U` / `Shift+Alt+L` | Convert selection to uppercase/lowercase |
 | `Shift+Alt+C` | Toggle selection naming style (camelCase → PascalCase → snake_case → SCREAMING_SNAKE_CASE → kebab-case) |
 | `Mod+.` | Toggle code folding |