diff --git a/Source/WindowNIBs/Base.lproj/frmPrefWindow.xib b/Source/WindowNIBs/Base.lproj/frmPrefWindow.xib
index 20ca4069..fcdf372d 100644
--- a/Source/WindowNIBs/Base.lproj/frmPrefWindow.xib
+++ b/Source/WindowNIBs/Base.lproj/frmPrefWindow.xib
@@ -442,14 +442,14 @@
             <point key="canvasLocation" x="-1350" y="59"/>
         </view>
         <view id="3x9-Ir-gx7" userLabel="vwrCandidates">
-            <rect key="frame" x="0.0" y="0.0" width="577" height="389"/>
+            <rect key="frame" x="0.0" y="0.0" width="577" height="406"/>
             <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
             <subviews>
                 <stackView distribution="fill" orientation="vertical" alignment="leading" spacing="6" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" translatesAutoresizingMaskIntoConstraints="NO" id="Lhc-qO-8m5">
-                    <rect key="frame" x="20" y="34" width="530" height="335"/>
+                    <rect key="frame" x="20" y="30" width="530" height="356"/>
                     <subviews>
                         <stackView distribution="fill" orientation="vertical" alignment="leading" spacing="5" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" translatesAutoresizingMaskIntoConstraints="NO" id="zUw-eX-tDv">
-                            <rect key="frame" x="0.0" y="293" width="375" height="42"/>
+                            <rect key="frame" x="0.0" y="314" width="375" height="42"/>
                             <subviews>
                                 <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" verticalCompressionResistancePriority="751" translatesAutoresizingMaskIntoConstraints="NO" id="Ldp-U1-36g">
                                     <rect key="frame" x="-2" y="27" width="379" height="15"/>
@@ -522,13 +522,13 @@
                             </customSpacing>
                         </stackView>
                         <box verticalHuggingPriority="750" boxType="separator" translatesAutoresizingMaskIntoConstraints="NO" id="nRb-2Q-BSg">
-                            <rect key="frame" x="0.0" y="284" width="530" height="5"/>
+                            <rect key="frame" x="0.0" y="305" width="530" height="5"/>
                             <constraints>
                                 <constraint firstAttribute="width" relation="greaterThanOrEqual" constant="530" id="1Jo-sk-xF9"/>
                             </constraints>
                         </box>
                         <stackView distribution="fill" orientation="vertical" alignment="leading" spacing="5" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" translatesAutoresizingMaskIntoConstraints="NO" id="9L9-ua-Bhv">
-                            <rect key="frame" x="0.0" y="238" width="516" height="42"/>
+                            <rect key="frame" x="0.0" y="259" width="516" height="42"/>
                             <subviews>
                                 <textField horizontalHuggingPriority="251" verticalHuggingPriority="749" translatesAutoresizingMaskIntoConstraints="NO" id="Yl4-Ar-L6r">
                                     <rect key="frame" x="-2" y="27" width="314" height="15"/>
@@ -628,13 +628,13 @@
                             </customSpacing>
                         </stackView>
                         <box verticalHuggingPriority="750" boxType="separator" translatesAutoresizingMaskIntoConstraints="NO" id="r0h-9S-fRl">
-                            <rect key="frame" x="0.0" y="229" width="530" height="5"/>
+                            <rect key="frame" x="0.0" y="250" width="530" height="5"/>
                             <constraints>
                                 <constraint firstAttribute="width" relation="greaterThanOrEqual" constant="530" id="EJu-Y7-gmC"/>
                             </constraints>
                         </box>
                         <stackView distribution="fill" orientation="vertical" alignment="leading" spacing="5" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" translatesAutoresizingMaskIntoConstraints="NO" id="Y6y-r1-U6p">
-                            <rect key="frame" x="0.0" y="183" width="313" height="42"/>
+                            <rect key="frame" x="0.0" y="204" width="313" height="42"/>
                             <subviews>
                                 <textField autoresizesSubviews="NO" verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="IpX-f7-rTL">
                                     <rect key="frame" x="-2" y="27" width="317" height="15"/>
@@ -701,13 +701,13 @@
                             </customSpacing>
                         </stackView>
                         <box verticalHuggingPriority="750" boxType="separator" translatesAutoresizingMaskIntoConstraints="NO" id="7MU-T2-vKY">
-                            <rect key="frame" x="0.0" y="174" width="530" height="5"/>
+                            <rect key="frame" x="0.0" y="195" width="530" height="5"/>
                             <constraints>
                                 <constraint firstAttribute="width" relation="greaterThanOrEqual" constant="530" id="QYu-4N-uc8"/>
                             </constraints>
                         </box>
                         <stackView distribution="fill" orientation="vertical" alignment="leading" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" translatesAutoresizingMaskIntoConstraints="NO" id="o0j-33-VXh">
-                            <rect key="frame" x="0.0" y="92" width="399" height="78"/>
+                            <rect key="frame" x="0.0" y="113" width="399" height="78"/>
                             <subviews>
                                 <textField verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="13">
                                     <rect key="frame" x="-2" y="63" width="403" height="15"/>
@@ -768,16 +768,16 @@
                             </customSpacing>
                         </stackView>
                         <box verticalHuggingPriority="750" boxType="separator" translatesAutoresizingMaskIntoConstraints="NO" id="FjU-gN-TjQ">
-                            <rect key="frame" x="0.0" y="83" width="530" height="5"/>
+                            <rect key="frame" x="0.0" y="104" width="530" height="5"/>
                             <constraints>
                                 <constraint firstAttribute="width" relation="greaterThanOrEqual" constant="530" id="KwJ-oJ-qAN"/>
                             </constraints>
                         </box>
                         <stackView distribution="fill" orientation="vertical" alignment="leading" spacing="5" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" translatesAutoresizingMaskIntoConstraints="NO" id="7It-Pu-aCc">
-                            <rect key="frame" x="0.0" y="0.0" width="353" height="79"/>
+                            <rect key="frame" x="0.0" y="0.0" width="368" height="100"/>
                             <subviews>
                                 <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="3qX-dG-cKO">
-                                    <rect key="frame" x="-1" y="62.5" width="354" height="17"/>
+                                    <rect key="frame" x="-1" y="83.5" width="354" height="17"/>
                                     <constraints>
                                         <constraint firstAttribute="width" relation="greaterThanOrEqual" constant="70" id="VA4-8t-BXG"/>
                                         <constraint firstAttribute="height" constant="16" id="fAh-uj-Mwh"/>
@@ -791,7 +791,7 @@
                                     </connections>
                                 </button>
                                 <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="nCb-NT-HJK">
-                                    <rect key="frame" x="-1" y="41.5" width="351" height="17"/>
+                                    <rect key="frame" x="-1" y="62.5" width="351" height="17"/>
                                     <constraints>
                                         <constraint firstAttribute="height" constant="16" id="9wH-Rl-7QF"/>
                                     </constraints>
@@ -804,7 +804,7 @@
                                     </connections>
                                 </button>
                                 <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="B3F-E1F-360">
-                                    <rect key="frame" x="-1" y="20.5" width="305" height="17"/>
+                                    <rect key="frame" x="-1" y="41.5" width="305" height="17"/>
                                     <constraints>
                                         <constraint firstAttribute="height" constant="16" id="Ms0-e3-kEx"/>
                                     </constraints>
@@ -816,6 +816,25 @@
                                         <binding destination="32" name="value" keyPath="values.UseFixecCandidateOrderOnSelection" id="1E3-367-430"/>
                                     </connections>
                                 </button>
+                                <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="EPi-az-Ri2">
+                                    <rect key="frame" x="-1" y="20.5" width="369" height="17"/>
+                                    <constraints>
+                                        <constraint firstAttribute="height" constant="16" id="dhm-Zn-JrH"/>
+                                        <constraint firstAttribute="width" relation="greaterThanOrEqual" constant="70" id="dxM-0y-3eP"/>
+                                    </constraints>
+                                    <buttonCell key="cell" type="check" title="Enable mouse wheel support for Tadokoro Candidate Window" bezelStyle="regularSquare" imagePosition="left" controlSize="small" inset="2" id="lDd-rN-BSM">
+                                        <behavior key="behavior" changeContents="YES" doesNotDimImage="YES" lightByContents="YES"/>
+                                        <font key="font" metaFont="cellTitle"/>
+                                    </buttonCell>
+                                    <connections>
+                                        <binding destination="32" name="value" keyPath="values.EnableMouseScrollingForTDKCandidatesCocoa" id="Oyc-s5-cFP"/>
+                                        <binding destination="32" name="enabled" keyPath="values.UseIMKCandidateWindow" id="12U-Cd-k9q">
+                                            <dictionary key="options">
+                                                <string key="NSValueTransformerName">NSNegateBoolean</string>
+                                            </dictionary>
+                                        </binding>
+                                    </connections>
+                                </button>
                                 <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="Hyc-Nw-dET">
                                     <rect key="frame" x="-1" y="-0.5" width="319" height="17"/>
                                     <constraints>
@@ -835,12 +854,14 @@
                                 <integer value="1000"/>
                                 <integer value="1000"/>
                                 <integer value="1000"/>
+                                <integer value="1000"/>
                             </visibilityPriorities>
                             <customSpacing>
                                 <real value="3.4028234663852886e+38"/>
                                 <real value="3.4028234663852886e+38"/>
                                 <real value="3.4028234663852886e+38"/>
                                 <real value="3.4028234663852886e+38"/>
+                                <real value="3.4028234663852886e+38"/>
                             </customSpacing>
                         </stackView>
                     </subviews>
@@ -872,7 +893,7 @@
                 <constraint firstItem="Lhc-qO-8m5" firstAttribute="top" secondItem="3x9-Ir-gx7" secondAttribute="top" constant="20" symbolic="YES" id="4nk-6f-bZb"/>
                 <constraint firstItem="Lhc-qO-8m5" firstAttribute="leading" secondItem="3x9-Ir-gx7" secondAttribute="leading" constant="20" symbolic="YES" id="Xv4-Dc-8wm"/>
             </constraints>
-            <point key="canvasLocation" x="-715.5" y="50.5"/>
+            <point key="canvasLocation" x="-715.5" y="59"/>
         </view>
         <customObject id="-3" userLabel="Application" customClass="NSObject"/>
         <view id="XWo-36-xGi" userLabel="vwrBehavior">
@@ -1562,7 +1583,7 @@
                             <rect key="frame" x="0.0" y="71" width="538" height="370"/>
                             <clipView key="contentView" drawsBackground="NO" id="x8s-wo-bxi">
                                 <rect key="frame" x="0.0" y="0.0" width="538" height="370"/>
-                                <autoresizingMask key="autoresizingMask"/>
+                                <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                 <subviews>
                                     <textView wantsLayer="YES" importsGraphics="NO" richText="NO" verticallyResizable="YES" allowsUndo="YES" smartInsertDelete="YES" id="kSG-dz-P2N">
                                         <rect key="frame" x="0.0" y="0.0" width="538" height="370"/>
diff --git a/Source/WindowNIBs/en.lproj/frmPrefWindow.strings b/Source/WindowNIBs/en.lproj/frmPrefWindow.strings
index be95fb02..9fd71953 100644
--- a/Source/WindowNIBs/en.lproj/frmPrefWindow.strings
+++ b/Source/WindowNIBs/en.lproj/frmPrefWindow.strings
@@ -84,6 +84,7 @@
 "lblIntonationKeyBehavior.title" = "Specify what intonation key does when syllable composer is empty.";
 "lblShiftBkspKeyBehavior.title" = "Choose the attempted behavior of Shift+BackSpace key.";
 "lblUpperCaseLetterKeyBehavior.title" = "Choose the behavior of Shift+Letter key with letter inputs.";
+"lDd-rN-BSM.title" = "Enable mouse wheel support for Tadokoro Candidate Window";
 "MKJ-Q6-dLd.title" = "Also use “\\” or “¥” key for Hanin Keyboard Symbol Input";
 "N6e-bR-mVa.title" = "Disable segmented thick underline in marking mode for managed clients";
 "neb-Pz-n1h.title" = "Auto-composite when the longest possible key is formed";
diff --git a/Source/WindowNIBs/ja.lproj/frmPrefWindow.strings b/Source/WindowNIBs/ja.lproj/frmPrefWindow.strings
index e5178a21..bb44bd0c 100644
--- a/Source/WindowNIBs/ja.lproj/frmPrefWindow.strings
+++ b/Source/WindowNIBs/ja.lproj/frmPrefWindow.strings
@@ -84,6 +84,7 @@
 "lblIntonationKeyBehavior.title" = "音調組立緩衝列が空かされた時の音調キーの行為をご指定ください。";
 "lblShiftBkspKeyBehavior.title" = "Shift+BackSpace キーの優先行為をご指定ください。";
 "lblUpperCaseLetterKeyBehavior.title" = "Shift+文字キーの行為をご指定ください。";
+"lDd-rN-BSM.title" = "田所候補陳列ウィンドウのマウススクロール機能を起用";
 "MKJ-Q6-dLd.title" = "「\\」・「¥」キーでも漢音キーボード符号入力";
 "N6e-bR-mVa.title" = "管理されている客体アプリには、マーキングモードの多段式太下線の描きを禁ず";
 "neb-Pz-n1h.title" = "最長可能キーができた場合、文字を組み立つ";
diff --git a/Source/WindowNIBs/zh-Hans.lproj/frmPrefWindow.strings b/Source/WindowNIBs/zh-Hans.lproj/frmPrefWindow.strings
index 6ccc56f2..6c660342 100644
--- a/Source/WindowNIBs/zh-Hans.lproj/frmPrefWindow.strings
+++ b/Source/WindowNIBs/zh-Hans.lproj/frmPrefWindow.strings
@@ -84,6 +84,7 @@
 "lblIntonationKeyBehavior.title" = "指定声调键（在注拼槽为「空」状态时）的行为。";
 "lblShiftBkspKeyBehavior.title" = "指定 Shift+BackSpace 组合键率先尝试的行为。";
 "lblUpperCaseLetterKeyBehavior.title" = "指定 Shift+字母键 的行为。";
+"lDd-rN-BSM.title" = "启用田所选字窗的滑鼠滚动支援";
 "MKJ-Q6-dLd.title" = "亦使用「\\」或「¥」键启用汉音键盘符号模式";
 "N6e-bR-mVa.title" = "针对被管理的客体，在标记模式下禁用分段式粗型下划线";
 "neb-Pz-n1h.title" = "在已经敲出最长可能码的时候自动组字";
diff --git a/Source/WindowNIBs/zh-Hant.lproj/frmPrefWindow.strings b/Source/WindowNIBs/zh-Hant.lproj/frmPrefWindow.strings
index 9ed8b5a2..72bf3388 100644
--- a/Source/WindowNIBs/zh-Hant.lproj/frmPrefWindow.strings
+++ b/Source/WindowNIBs/zh-Hant.lproj/frmPrefWindow.strings
@@ -84,6 +84,7 @@
 "lblIntonationKeyBehavior.title" = "指定聲調鍵（在注拼槽為「空」狀態時）的行為。";
 "lblShiftBkspKeyBehavior.title" = "指定 Shift+BackSpace 組合鍵率先嘗試的行為。";
 "lblUpperCaseLetterKeyBehavior.title" = "指定 Shift+字母鍵 的行為。";
+"lDd-rN-BSM.title" = "啟用田所選字窗的滑鼠滾動支援";
 "MKJ-Q6-dLd.title" = "亦使用「\\」或「¥」鍵啟用漢音鍵盤符號模式";
 "N6e-bR-mVa.title" = "針對被管理的客體，在標記模式下禁用分段式粗型下劃線";
 "neb-Pz-n1h.title" = "在已經敲出最長可能碼的時候自動組字";