diff --git a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/CtlCandidate.swift b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/CtlCandidate.swift
index 6ad44b95..fd117a5f 100644
--- a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/CtlCandidate.swift
+++ b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/CtlCandidate.swift
@@ -10,7 +10,7 @@ import Cocoa
 import Shared
 
 open class CtlCandidate: NSWindowController, CtlCandidateProtocol {
-  open var hint: String = ""
+  open var tooltip: String = ""
   open var currentLayout: NSUserInterfaceLayoutOrientation = .horizontal
   open var locale: String = ""
   open var useLangIdentifier: Bool = false
@@ -110,15 +110,7 @@ open class CtlCandidate: NSWindowController, CtlCandidateProtocol {
     fatalError("init(coder:) has not been implemented")
   }
 
-  open var keyLabels: [CandidateCellData] = ["1", "2", "3", "4", "5", "6", "7", "8", "9"]
-    .map {
-      CandidateCellData(key: $0, displayedText: $0)
-    }
-
   open var candidateFont = NSFont.systemFont(ofSize: 18)
-  open var keyLabelFont = NSFont.monospacedDigitSystemFont(ofSize: 14, weight: .medium)
-
-  open var tooltip: String = ""
 
   @discardableResult open func showNextLine() -> Bool {
     false
diff --git a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/CtlCandidateTDK.swift b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/CtlCandidateTDK.swift
index 2087bb02..67ed6c63 100644
--- a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/CtlCandidateTDK.swift
+++ b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/CtlCandidateTDK.swift
@@ -18,20 +18,20 @@ public class CtlCandidateTDK: CtlCandidate {
 
   @available(macOS 12, *)
   public var theViewHorizontal: VwrCandidateHorizontal {
-    .init(controller: self, thePool: thePoolHorizontal, hint: hint)
+    .init(controller: self, thePool: thePoolHorizontal, tooltip: tooltip)
   }
 
   @available(macOS 12, *)
   public var theViewVertical: VwrCandidateVertical {
-    .init(controller: self, thePool: thePoolVertical, hint: hint)
+    .init(controller: self, thePool: thePoolVertical, tooltip: tooltip)
   }
 
   public var theViewHorizontalBackports: VwrCandidateHorizontalBackports {
-    .init(controller: self, thePool: thePoolHorizontal, hint: hint)
+    .init(controller: self, thePool: thePoolHorizontal, tooltip: tooltip)
   }
 
   public var theViewVerticalBackports: VwrCandidateVerticalBackports {
-    .init(controller: self, thePool: thePoolVertical, hint: hint)
+    .init(controller: self, thePool: thePoolVertical, tooltip: tooltip)
   }
 
   public var thePool: CandidatePool {
diff --git a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/VwrCandidateHorizontal.swift b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/VwrCandidateHorizontal.swift
index 19cb27ca..cfbdda1e 100644
--- a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/VwrCandidateHorizontal.swift
+++ b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/VwrCandidateHorizontal.swift
@@ -37,7 +37,7 @@ struct CandidatePoolViewUIHorizontal_Previews: PreviewProvider {
 public struct VwrCandidateHorizontal: View {
   public var controller: CtlCandidateTDK
   @State public var thePool: CandidatePool
-  @State public var hint: String = ""
+  @State public var tooltip: String = ""
 
   private var positionLabel: String {
     (thePool.highlightedIndex + 1).description + "/" + thePool.candidateDataAll.count.description
@@ -91,16 +91,17 @@ public struct VwrCandidateHorizontal: View {
       .fixedSize(horizontal: false, vertical: true).padding(5)
       .background(Color(nsColor: NSColor.controlBackgroundColor).ignoresSafeArea())
       ZStack(alignment: .leading) {
-        Color(nsColor: hint.isEmpty ? .windowBackgroundColor : CandidateCellData.highlightBackground).ignoresSafeArea()
+        Color(nsColor: tooltip.isEmpty ? .windowBackgroundColor : CandidateCellData.highlightBackground)
+          .ignoresSafeArea()
         HStack(alignment: .bottom) {
-          Text(hint).font(.system(size: max(CandidateCellData.unifiedSize * 0.7, 11), weight: .bold)).lineLimit(1)
+          Text(tooltip).font(.system(size: max(CandidateCellData.unifiedSize * 0.7, 11), weight: .bold)).lineLimit(1)
           Spacer()
           Text(positionLabel).font(.system(size: max(CandidateCellData.unifiedSize * 0.7, 11), weight: .bold))
             .lineLimit(
               1)
         }
         .padding(6).foregroundColor(
-          .init(nsColor: hint.isEmpty ? .controlTextColor : .selectedMenuItemTextColor.withAlphaComponent(0.9))
+          .init(nsColor: tooltip.isEmpty ? .controlTextColor : .selectedMenuItemTextColor.withAlphaComponent(0.9))
         )
       }
     }
diff --git a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/VwrCandidateVertical.swift b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/VwrCandidateVertical.swift
index 6bdee970..46f6ec4b 100644
--- a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/VwrCandidateVertical.swift
+++ b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates/VwrCandidateVertical.swift
@@ -36,7 +36,7 @@ struct CandidatePoolViewUIVertical_Previews: PreviewProvider {
 public struct VwrCandidateVertical: View {
   public var controller: CtlCandidateTDK
   @State public var thePool: CandidatePool
-  @State public var hint: String = ""
+  @State public var tooltip: String = ""
 
   private var positionLabel: String {
     (thePool.highlightedIndex + 1).description + "/" + thePool.candidateDataAll.count.description
@@ -96,16 +96,17 @@ public struct VwrCandidateVertical: View {
       .fixedSize(horizontal: true, vertical: false).padding(5)
       .background(Color(nsColor: NSColor.controlBackgroundColor).ignoresSafeArea())
       ZStack(alignment: .leading) {
-        Color(nsColor: hint.isEmpty ? .windowBackgroundColor : CandidateCellData.highlightBackground).ignoresSafeArea()
+        Color(nsColor: tooltip.isEmpty ? .windowBackgroundColor : CandidateCellData.highlightBackground)
+          .ignoresSafeArea()
         HStack(alignment: .bottom) {
-          Text(hint).font(.system(size: max(CandidateCellData.unifiedSize * 0.7, 11), weight: .bold)).lineLimit(1)
+          Text(tooltip).font(.system(size: max(CandidateCellData.unifiedSize * 0.7, 11), weight: .bold)).lineLimit(1)
           Spacer()
           Text(positionLabel).font(.system(size: max(CandidateCellData.unifiedSize * 0.7, 11), weight: .bold))
             .lineLimit(
               1)
         }
         .padding(6).foregroundColor(
-          .init(nsColor: hint.isEmpty ? .controlTextColor : .selectedMenuItemTextColor.withAlphaComponent(0.9))
+          .init(nsColor: tooltip.isEmpty ? .controlTextColor : .selectedMenuItemTextColor.withAlphaComponent(0.9))
         )
       }
     }
diff --git a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates_Backports/VwrCandidateHorizontalBackports.swift b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates_Backports/VwrCandidateHorizontalBackports.swift
index 7abd13a9..efedab54 100644
--- a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates_Backports/VwrCandidateHorizontalBackports.swift
+++ b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates_Backports/VwrCandidateHorizontalBackports.swift
@@ -39,7 +39,7 @@ public struct VwrCandidateHorizontalBackports: View {
   @Environment(\.colorScheme) var colorScheme
   public var controller: CtlCandidateTDK
   @State public var thePool: CandidatePool
-  @State public var hint: String = ""
+  @State public var tooltip: String = ""
 
   private var positionLabel: String {
     (thePool.highlightedIndex + 1).description + "/" + thePool.candidateDataAll.count.description
@@ -93,20 +93,20 @@ public struct VwrCandidateHorizontalBackports: View {
       .fixedSize(horizontal: false, vertical: true).padding(5)
       .background(Color(white: colorScheme == .dark ? 0.1 : 1))
       ZStack(alignment: .leading) {
-        if hint.isEmpty {
+        if tooltip.isEmpty {
           Color(white: colorScheme == .dark ? 0.2 : 0.9)
         } else {
           controller.highlightedColorUIBackports
         }
         HStack(alignment: .bottom) {
-          Text(hint).font(.system(size: max(CandidateCellData.unifiedSize * 0.7, 11), weight: .bold)).lineLimit(1)
+          Text(tooltip).font(.system(size: max(CandidateCellData.unifiedSize * 0.7, 11), weight: .bold)).lineLimit(1)
           Spacer()
           Text(positionLabel).font(.system(size: max(CandidateCellData.unifiedSize * 0.7, 11), weight: .bold))
             .lineLimit(
               1)
         }
         .padding(6).foregroundColor(
-          hint.isEmpty && colorScheme == .light ? Color(white: 0.1) : Color(white: 0.9)
+          tooltip.isEmpty && colorScheme == .light ? Color(white: 0.1) : Color(white: 0.9)
         )
       }
     }
diff --git a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates_Backports/VwrCandidateVerticalBackports.swift b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates_Backports/VwrCandidateVerticalBackports.swift
index 51137f2f..30ea03e7 100644
--- a/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates_Backports/VwrCandidateVerticalBackports.swift
+++ b/Packages/vChewing_CandidateWindow/Sources/CandidateWindow/TDKCandidates_Backports/VwrCandidateVerticalBackports.swift
@@ -38,7 +38,7 @@ public struct VwrCandidateVerticalBackports: View {
   @Environment(\.colorScheme) var colorScheme
   public var controller: CtlCandidateTDK
   @State public var thePool: CandidatePool
-  @State public var hint: String = ""
+  @State public var tooltip: String = ""
 
   private var positionLabel: String {
     (thePool.highlightedIndex + 1).description + "/" + thePool.candidateDataAll.count.description
@@ -98,20 +98,20 @@ public struct VwrCandidateVerticalBackports: View {
       .fixedSize(horizontal: true, vertical: false).padding(5)
       .background(Color(white: colorScheme == .dark ? 0.1 : 1))
       ZStack(alignment: .leading) {
-        if hint.isEmpty {
+        if tooltip.isEmpty {
           Color(white: colorScheme == .dark ? 0.2 : 0.9)
         } else {
           controller.highlightedColorUIBackports
         }
         HStack(alignment: .bottom) {
-          Text(hint).font(.system(size: max(CandidateCellData.unifiedSize * 0.7, 11), weight: .bold)).lineLimit(1)
+          Text(tooltip).font(.system(size: max(CandidateCellData.unifiedSize * 0.7, 11), weight: .bold)).lineLimit(1)
           Spacer()
           Text(positionLabel).font(.system(size: max(CandidateCellData.unifiedSize * 0.7, 11), weight: .bold))
             .lineLimit(
               1)
         }
         .padding(6).foregroundColor(
-          hint.isEmpty && colorScheme == .light ? Color(white: 0.1) : Color(white: 0.9)
+          tooltip.isEmpty && colorScheme == .light ? Color(white: 0.1) : Color(white: 0.9)
         )
       }
     }
diff --git a/Packages/vChewing_Shared/Sources/Shared/Protocols/CtlCandidateProtocol.swift b/Packages/vChewing_Shared/Sources/Shared/Protocols/CtlCandidateProtocol.swift
index 01cc803b..ec9df4c8 100644
--- a/Packages/vChewing_Shared/Sources/Shared/Protocols/CtlCandidateProtocol.swift
+++ b/Packages/vChewing_Shared/Sources/Shared/Protocols/CtlCandidateProtocol.swift
@@ -18,17 +18,14 @@ public protocol CtlCandidateDelegate: AnyObject {
 }
 
 public protocol CtlCandidateProtocol {
-  var hint: String { get set }
+  var tooltip: String { get set }
   var locale: String { get set }
   var currentLayout: NSUserInterfaceLayoutOrientation { get set }
   var delegate: CtlCandidateDelegate? { get set }
   var selectedCandidateIndex: Int { get set }
   var visible: Bool { get set }
   var windowTopLeftPoint: NSPoint { get set }
-  var keyLabels: [CandidateCellData] { get set }
-  var keyLabelFont: NSFont { get set }
   var candidateFont: NSFont { get set }
-  var tooltip: String { get set }
   var useLangIdentifier: Bool { get set }
 
   init(_ layout: NSUserInterfaceLayoutOrientation)
diff --git a/Packages/vChewing_Shared/Sources/Shared/Protocols/PrefMgrProtocol.swift b/Packages/vChewing_Shared/Sources/Shared/Protocols/PrefMgrProtocol.swift
index b4261cdc..024a1fce 100644
--- a/Packages/vChewing_Shared/Sources/Shared/Protocols/PrefMgrProtocol.swift
+++ b/Packages/vChewing_Shared/Sources/Shared/Protocols/PrefMgrProtocol.swift
@@ -60,7 +60,6 @@ public protocol PrefMgrProtocol {
   var specifyShiftTabKeyBehavior: Bool { get set }
   var specifyShiftSpaceKeyBehavior: Bool { get set }
   var candidateTextFontName: String { get set }
-  var candidateKeyLabelFontName: String { get set }
   var candidateKeys: String { get set }
   var useSCPCTypingMode: Bool { get set }
   var phraseReplacementEnabled: Bool { get set }
diff --git a/Packages/vChewing_Shared/Sources/Shared/Shared.swift b/Packages/vChewing_Shared/Sources/Shared/Shared.swift
index 6e781926..f4c90d43 100644
--- a/Packages/vChewing_Shared/Sources/Shared/Shared.swift
+++ b/Packages/vChewing_Shared/Sources/Shared/Shared.swift
@@ -66,7 +66,6 @@ public enum UserDef: String, CaseIterable {
   case kShiftKeyAccommodationBehavior = "ShiftKeyAccommodationBehavior"
 
   case kCandidateTextFontName = "CandidateTextFontName"
-  case kCandidateKeyLabelFontName = "CandidateKeyLabelFontName"
   case kCandidateKeys = "CandidateKeys"
 
   case kAssociatedPhrasesEnabled = "AssociatedPhrasesEnabled"
diff --git a/Source/Modules/KeyHandler_HandleCandidate.swift b/Source/Modules/KeyHandler_HandleCandidate.swift
index 597f5550..b722e979 100644
--- a/Source/Modules/KeyHandler_HandleCandidate.swift
+++ b/Source/Modules/KeyHandler_HandleCandidate.swift
@@ -232,9 +232,9 @@ extension KeyHandler {
     let match: String =
       (state.type == .ofAssociates) ? input.inputTextIgnoringModifiers ?? "" : input.text
 
-    for j in 0..<ctlCandidate.keyLabels.count {
-      let label: CandidateCellData = ctlCandidate.keyLabels[j]
-      if match.compare(label.key, options: .caseInsensitive, range: nil, locale: .current) == .orderedSame {
+    for j in 0..<PrefMgr.shared.candidateKeys.count {
+      let label = PrefMgr.shared.candidateKeys.charComponents[j]
+      if match.compare(label, options: .caseInsensitive, range: nil, locale: .current) == .orderedSame {
         index = j
         break
       }
diff --git a/Source/Modules/PrefMgr_Core.swift b/Source/Modules/PrefMgr_Core.swift
index adbf6ac4..05eed0df 100644
--- a/Source/Modules/PrefMgr_Core.swift
+++ b/Source/Modules/PrefMgr_Core.swift
@@ -234,9 +234,6 @@ public class PrefMgr: PrefMgrProtocol {
   @AppProperty(key: UserDef.kCandidateTextFontName.rawValue, defaultValue: "")
   public var candidateTextFontName: String
 
-  @AppProperty(key: UserDef.kCandidateKeyLabelFontName.rawValue, defaultValue: "")
-  public var candidateKeyLabelFontName: String
-
   @AppProperty(key: UserDef.kCandidateKeys.rawValue, defaultValue: kDefaultCandidateKeys)
   public var candidateKeys: String {
     didSet {
diff --git a/Source/Modules/SessionCtl_HandleDisplay.swift b/Source/Modules/SessionCtl_HandleDisplay.swift
index c69ef086..b6f71b4d 100644
--- a/Source/Modules/SessionCtl_HandleDisplay.swift
+++ b/Source/Modules/SessionCtl_HandleDisplay.swift
@@ -111,35 +111,12 @@ extension SessionCtl {
       Self.ctlCandidateCurrent = CtlCandidateIMK(candidateLayout)
     }
 
-    // set the attributes for the candidate panel (which uses NSAttributedString)
-    let textSize = PrefMgr.shared.candidateListTextSize
-    let minimumKeyLabelSize: Double = 10
-    let keyLabelSize = max(textSize / 2, minimumKeyLabelSize)
-
-    func labelFont(name: String?, size: Double) -> NSFont {
-      if let name = name {
-        return NSFont(name: name, size: size) ?? NSFont.systemFont(ofSize: size)
-      }
-      return NSFont.systemFont(ofSize: size)
-    }
-
-    Self.ctlCandidateCurrent.keyLabelFont = labelFont(
-      name: PrefMgr.shared.candidateKeyLabelFontName, size: keyLabelSize
-    )
     Self.ctlCandidateCurrent.candidateFont = Self.candidateFont(
-      name: PrefMgr.shared.candidateTextFontName, size: textSize
+      name: PrefMgr.shared.candidateTextFontName, size: PrefMgr.shared.candidateListTextSize
     )
 
-    let candidateKeys = PrefMgr.shared.candidateKeys
-    let keyLabels =
-      candidateKeys.count > 4 ? Array(candidateKeys) : Array(CandidateKey.defaultKeys)
-    let keyLabelSuffix = state.type == .ofAssociates ? "^" : ""
-    Self.ctlCandidateCurrent.keyLabels = keyLabels.map {
-      CandidateCellData(key: String($0), displayedText: String($0) + keyLabelSuffix)
-    }
-
     if state.type == .ofAssociates {
-      Self.ctlCandidateCurrent.hint = NSLocalizedString("Hold ⇧ to choose associates.", comment: "")
+      Self.ctlCandidateCurrent.tooltip = NSLocalizedString("Hold ⇧ to choose associates.", comment: "")
     }
 
     Self.ctlCandidateCurrent.useLangIdentifier = PrefMgr.shared.handleDefaultCandidateFontsByLangIdentifier
diff --git a/Source/Modules/UIModules/CandidateUI/IMKCandidatesImpl.swift b/Source/Modules/UIModules/CandidateUI/IMKCandidatesImpl.swift
index 973fb49f..73ed646d 100644
--- a/Source/Modules/UIModules/CandidateUI/IMKCandidatesImpl.swift
+++ b/Source/Modules/UIModules/CandidateUI/IMKCandidatesImpl.swift
@@ -11,7 +11,7 @@ import Shared
 
 /// 威注音自用的 IMKCandidates 型別。因為有用到 bridging header，所以無法弄成 Swift Package。
 public class CtlCandidateIMK: IMKCandidates, CtlCandidateProtocol {
-  public var hint: String = ""
+  public var tooltip: String = ""
   public var locale: String = ""
   public var useLangIdentifier: Bool = false
   public var currentLayout: NSUserInterfaceLayoutOrientation = .horizontal
@@ -38,15 +38,6 @@ public class CtlCandidateIMK: IMKCandidates, CtlCandidateProtocol {
     }
   }
 
-  public var keyLabels: [CandidateCellData] = ["1", "2", "3", "4", "5", "6", "7", "8", "9"]
-    .map {
-      CandidateCellData(key: $0, displayedText: $0)
-    }
-
-  public var keyLabelFont = NSFont.monospacedDigitSystemFont(
-    ofSize: 14, weight: .medium
-  )
-
   public var candidateFont = NSFont.systemFont(ofSize: 16) {
     didSet {
       if #available(macOS 10.14, *) { setFontSize(candidateFont.pointSize) }
@@ -63,11 +54,6 @@ public class CtlCandidateIMK: IMKCandidates, CtlCandidateProtocol {
     }
   }
 
-  public var tooltip: String = ""
-
-  var keyCount = 0
-  var displayedCandidates = [String]()
-
   public func specifyLayout(_ layout: NSUserInterfaceLayoutOrientation = .horizontal) {
     currentLayout = layout
     switch currentLayout {
@@ -107,7 +93,6 @@ public class CtlCandidateIMK: IMKCandidates, CtlCandidateProtocol {
     // guard let delegate = delegate else { return }  // 下文無效，所以這句沒用。
     // 既然下述函式無效，那中間這段沒用的也都砍了。
     // setCandidateData(candidates)  // 該函式無效。
-    keyCount = selectionKeys().count
     selectedCandidateIndex = 0
     update()
   }
@@ -115,15 +100,6 @@ public class CtlCandidateIMK: IMKCandidates, CtlCandidateProtocol {
   /// 幹話：這裡很多函式內容亂寫也都無所謂了，因為都被 IMKCandidates 代管執行。
   /// 對於所有 IMK 選字窗的選字判斷動作，不是在 keyHandler 中，而是在 `ctlIME_Core` 中。
 
-  private var currentPageIndex: Int = 0
-
-  private var pageCount: Int {
-    guard let delegate = delegate else { return 0 }
-    let totalCount = delegate.candidatePairs(conv: false).count
-    let keyLabelCount = keyLabels.count
-    return totalCount / keyLabelCount + ((totalCount % keyLabelCount) != 0 ? 1 : 0)
-  }
-
   // 該函式會影響 IMK 選字窗。
   @discardableResult public func showNextPage() -> Bool {
     do { currentLayout == .vertical ? moveRight(self) : moveDown(self) }
@@ -160,11 +136,8 @@ public class CtlCandidateIMK: IMKCandidates, CtlCandidateProtocol {
     return true
   }
 
-  public func candidateIndexAtKeyLabelIndex(_ index: Int) -> Int {
-    guard let delegate = delegate else { return Int.max }
-    let result = currentPageIndex * keyLabels.count + index
-    return result < delegate.candidatePairs(conv: false).count ? result : Int.max
-  }
+  // IMK 選字窗目前無法實作該函式。威注音 IMK 選字窗目前也不需要使用該函式。
+  public func candidateIndexAtKeyLabelIndex(_: Int) -> Int { 0 }
 
   public var selectedCandidateIndex: Int {
     get { selectedCandidate() }