diff --git a/TeXmacs/progs/math/math-kbd.scm b/TeXmacs/progs/math/math-kbd.scm
index c1912f7681..1fbac81151 100644
--- a/TeXmacs/progs/math/math-kbd.scm
+++ b/TeXmacs/progs/math/math-kbd.scm
@@ -1679,9 +1679,11 @@
   ("b var var" "<flat>")
   ("c var" "<varsigma>")
   ("c var var" "<sigma>")
+  ("c - var" "<#A793>")
   ("d var" "<delta>")
   ("d var var" "<mathd>")
   ("d var var var" "<partial>")
+  ("d - var " "<#111>")
   ("e var" "<varepsilon>")
   ("e var var" "<mathe>")
   ("e var var var" "<epsilon>")
@@ -1698,27 +1700,33 @@
   ("j var var var" "<vartheta>")
   ("k var" "<kappa>")
   ("k var var" "<varkappa>")
+  ("k - var" "<#A741>")
   ("l var" "<lambda>")
   ("l var var" "<mathlambda>")
   ("l var var var" "<ell>")
+  ("l - var" "<#A749>")
   ("m var" "<mu>")
   ("n var" "<nu>")
   ("n var var" "<nabla>")
   ("o var" "<omicron>")
+  ("o - var" "<#A74B>")
   ("p var" "<pi>")
   ("p var var" "<mathpi>")
   ("p var var var" "<varpi>")
+  ("p - var" "<#A751>")
   ("q var" "<chi>")
   ("r var" "<rho>")
   ("r var var" "<varrho>")
   ("s var" "<sigma>")
   ("s var var" "<varsigma>")
+  ("s - var" "<#A7A9>")
   ("t var" "<tau>")
   ("u var" "<upsilon>")
   ("v var" "<phi>")
   ("v var var" "<varphi>")
   ("f var" "<varphi>")
   ("f var var" "<phi>")
+  ("f - var" "<#A799>")
   ("w var" "<omega>")
   ("w var var" "<mho>")
   ("x var" "<xi>")
@@ -1734,10 +1742,12 @@
   ("C var" "<Sigma>")
   ("C var var" "<mathcatalan>")
   ("C var var var" "<complement>")
+  ("C - var" "<#A792>")
   ("D var" "<Delta>")
   ("D var var" "<mathD>")
   ("D var var var" "<daleth>")
   ("D var var var var" "<nabla>")
+  ("D - var" "<#110>")
   ("E var" "<Epsilon>")
   ("E var var" "<exists>")
   ("E var var var" "<Exists>")
@@ -1756,20 +1766,25 @@
   ("I var var var" "<Im>")
   ("J var" "<Theta>")
   ("K var" "<Kappa>")
+  ("K - var" "<#A740>")
   ("L var" "<Lambda>")
+  ("L - var" "<#A748>")
   ("M var" "<Mu>")
   ("N var" "<Nu>")
   ("N var var" (math-big-operator "cap"))
   ("O var" "<Omicron>")
+  ("O - var" "<#A74A>")
   ("P var" "<Pi>")
   ("P var var" "<wp>")
   ("P var var var" (math-big-operator "prod"))
+  ("P - var" "<#A750>")
   ("Q var" "<Chi>")
   ("R var" "<Rho>")
   ("R var var" "<Re>")
   ("S var" "<Sigma>")
   ("S var var" "<Backsigma>")
   ("S var var var" (math-big-operator "sum"))
+  ("S - var" "<#A7A8>")
   ("T var" "<Tau>")
   ("T var var" "<top>")
   ("T var var var" "<perp>")
@@ -1782,6 +1797,7 @@
   ("V var" "<Phi>")
   ("V var var" "<nabla>")
   ("F var" "<Phi>")
+  ("F - var" "<#A798>")
   ("W var" "<Omega>")
   ("W var var" "<Mho>")
   ("X var" "<Xi>")
diff --git a/devel/201_74.md b/devel/201_74.md
new file mode 100644
index 0000000000..6f4e3a19d0
--- /dev/null
+++ b/devel/201_74.md
@@ -0,0 +1,25 @@
+# [201_74] 新增横线字母快捷键
+
+##  如何测试
+1. 进入数学模式，分别测试如下快捷家
+
+| 快捷键 | 
+| --- | 
+| `k - Tab` | 
+| `K - Tab` | 
+| `l - Tab` | 
+| `L - Tab` | 
+| `o - Tab` | 
+| `O - Tab` | 
+| `p - Tab` | 
+| `P - Tab` | 
+| `f - Tab` | 
+| `F - Tab` | 
+| `c - Tab` | 
+| `C - Tab` | 
+| `s - Tab` | 
+| `S - Tab` | 
+| `d - Tab` |
+| `D - Tab` | 
+
+## 2026/02/05 新增横线字母快捷键
\ No newline at end of file