diff --git a/src/muya/lib/config/index.js b/src/muya/lib/config/index.js
index 815f5bcf..3a583693 100644
--- a/src/muya/lib/config/index.js
+++ b/src/muya/lib/config/index.js
@@ -55,7 +55,8 @@ export const EVENT_KEYS = Object.freeze(generateKeyHash([
   'ArrowLeft',
   'ArrowRight',
   'Tab',
-  'Escape'
+  'Escape',
+  'Shift'
 ]))
 
 export const LOWERCASE_TAGS = Object.freeze(generateKeyHash([
diff --git a/src/muya/lib/eventHandler/keyboard.js b/src/muya/lib/eventHandler/keyboard.js
index c4462cf8..68922db2 100644
--- a/src/muya/lib/eventHandler/keyboard.js
+++ b/src/muya/lib/eventHandler/keyboard.js
@@ -8,6 +8,7 @@ class Keyboard {
   constructor (muya) {
     this.muya = muya
     this.isComposed = false
+    this.isShiftDown = false
     this.shownFloat = new Set()
     this.recordIsComposed()
     this.dispatchEditorState()
@@ -187,6 +188,10 @@ class Keyboard {
         case EVENT_KEYS.Tab:
           contentState.tabHandler(event)
           break
+        case EVENT_KEYS.Shift:
+          eventCenter.dispatch('muya-format-picker', { reference: null })
+          this.isShiftDown = true
+          break
         default:
           break
       }
@@ -252,6 +257,10 @@ class Keyboard {
         })
       }
 
+      if (event.key === EVENT_KEYS.Shift) {
+        this.isShiftDown = false
+      }
+
       const { anchor, focus, start, end } = selection.getCursorRange()
       if (!anchor || !focus) {
         return
@@ -276,6 +285,7 @@ class Keyboard {
 
       const block = contentState.getBlock(anchor.key)
       if (
+        this.isShiftDown === false &&
         anchor.key === focus.key &&
         anchor.offset !== focus.offset &&
         block.functionType !== 'codeContent' &&