diff --git a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/CandidateCellData_Core.swift b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/CandidateCellData_Core.swift
index 9de09970..a9be9ddb 100644
--- a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/CandidateCellData_Core.swift
+++ b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/CandidateCellData_Core.swift
@@ -200,14 +200,14 @@ public class CandidateCellData: Hashable {
     return attrStrCandidate
   }
 
-  public var charDescriptions: [String] {
+  public func charDescriptions(shortened: Bool = false) -> [String] {
     var result = displayedText
     if displayedText.contains("("), displayedText.count > 2 {
       result = displayedText.replacingOccurrences(of: "(", with: "").replacingOccurrences(of: ")", with: "")
     }
     return result.flatMap(\.unicodeScalars).compactMap {
       let theName: String = $0.properties.name ?? ""
-      return String(format: "U+%02X %@", $0.value, theName)
+      return shortened ? String(format: "U+%02X", $0.value) : String(format: "U+%02X %@", $0.value, theName)
     }
   }
 
diff --git a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/CandidatePool_CocoaImpl.swift b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/CandidatePool_CocoaImpl.swift
index 5c3ba073..5afe0650 100644
--- a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/CandidatePool_CocoaImpl.swift
+++ b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/CandidatePool_CocoaImpl.swift
@@ -301,10 +301,12 @@ extension CandidatePool {
       .font: Self.blankCell.phraseFont(size: reverseLookupTextSize),
     ]
     let result = NSMutableAttributedString(string: "", attributes: attrReverseLookupSpacer)
+    var addedCounter = 0
     for neta in reverseLookupResult {
       result.append(NSAttributedString(string: " ", attributes: attrReverseLookupSpacer))
       result.append(NSAttributedString(string: " \(neta) ", attributes: attrReverseLookup))
-      if maxLinesPerPage == 1 { break }
+      addedCounter += 1
+      if maxLinesPerPage == 1, addedCounter == 2 { break }
     }
     return result
   }
diff --git a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/CtlCandidateTDK.swift b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/CtlCandidateTDK.swift
index dfbc7e77..ad86f1e8 100644
--- a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/CtlCandidateTDK.swift
+++ b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/CtlCandidateTDK.swift
@@ -108,16 +108,30 @@ public class CtlCandidateTDK: CtlCandidate, NSWindowDelegate {
 
   override open func updateDisplay() {
     guard let window = window else { return }
-    if let currentCandidateText = Self.thePool.currentSelectedCandidateText {
-      reverseLookupResult = delegate?.reverseLookup(for: currentCandidateText) ?? []
-      Self.thePool.reverseLookupResult = reverseLookupResult
-      Self.thePool.tooltip = delegate?.candidateToolTip(shortened: !Self.thePool.isMatrix) ?? ""
-    }
-    delegate?.candidatePairHighlightChanged(at: highlightedIndex)
     DispatchQueue.main.async { [weak self] in
       guard let self = self else { return }
       self.updateNSWindowModern(window)
     }
+    if let currentCandidate = Self.thePool.currentCandidate {
+      let displayedText = currentCandidate.displayedText
+      var lookupResult: [String?] = delegate?.reverseLookup(for: displayedText) ?? []
+      if displayedText.count == 1, delegate?.showCodePointForCurrentCandidate ?? false {
+        if lookupResult.isEmpty {
+          lookupResult.append(currentCandidate.charDescriptions(shortened: !Self.thePool.isMatrix).first)
+        } else {
+          lookupResult.insert(currentCandidate.charDescriptions(shortened: true).first, at: lookupResult.startIndex)
+        }
+        reverseLookupResult = lookupResult.compactMap { $0 }
+      } else {
+        // 如果不提供 UNICODE 碼位資料顯示的話，則在非多行多列模式下僅顯示一筆反查資料。
+        if !Self.thePool.isMatrix {
+          reverseLookupResult = [lookupResult.compactMap { $0 }.first].compactMap { $0 }
+        }
+      }
+      Self.thePool.reverseLookupResult = reverseLookupResult
+    }
+    Self.thePool.tooltip = delegate?.candidateToolTip(shortened: !Self.thePool.isMatrix) ?? ""
+    delegate?.candidatePairHighlightChanged(at: highlightedIndex)
   }
 
   func updateNSWindowModern(_ window: NSWindow) {
diff --git a/Packages/vChewing_MainAssembly/Sources/MainAssembly/SessionController/SessionCtl_Delegates.swift b/Packages/vChewing_MainAssembly/Sources/MainAssembly/SessionController/SessionCtl_Delegates.swift
index c3080e23..3e4570f9 100644
--- a/Packages/vChewing_MainAssembly/Sources/MainAssembly/SessionController/SessionCtl_Delegates.swift
+++ b/Packages/vChewing_MainAssembly/Sources/MainAssembly/SessionController/SessionCtl_Delegates.swift
@@ -80,6 +80,7 @@ extension SessionCtl: InputHandlerDelegate {
 
 extension SessionCtl: CtlCandidateDelegate {
   public var isCandidateState: Bool { state.isCandidateContainer }
+  public var showCodePointForCurrentCandidate: Bool { PrefMgr.shared.showCodePointInCandidateUI }
 
   public var clientAccentColor: NSColor? {
     var nullResponse = !PrefMgr.shared.respectClientAccentColor
diff --git a/Packages/vChewing_Shared/Sources/Shared/Protocols/CtlCandidateProtocol.swift b/Packages/vChewing_Shared/Sources/Shared/Protocols/CtlCandidateProtocol.swift
index b74b09bc..3175dc90 100644
--- a/Packages/vChewing_Shared/Sources/Shared/Protocols/CtlCandidateProtocol.swift
+++ b/Packages/vChewing_Shared/Sources/Shared/Protocols/CtlCandidateProtocol.swift
@@ -19,6 +19,7 @@ public protocol CtlCandidateDelegate {
   var selectionKeys: String { get }
   var isVerticalTyping: Bool { get }
   var isCandidateState: Bool { get }
+  var showCodePointForCurrentCandidate: Bool { get }
   var shouldAutoExpandCandidates: Bool { get }
   var isCandidateContextMenuEnabled: Bool { get }
   var showReverseLookupResult: Bool { get }