diff --git a/gui/dialogs/InstanceSettings.ui b/gui/dialogs/InstanceSettings.ui
index 930b772a..9c7e1757 100644
--- a/gui/dialogs/InstanceSettings.ui
+++ b/gui/dialogs/InstanceSettings.ui
@@ -168,6 +168,9 @@
          <layout class="QGridLayout" name="gridLayout_2">
           <item row="1" column="1">
            <widget class="QSpinBox" name="maxMemSpinBox">
+            <property name="toolTip">
+             <string>The maximum amount of memory Minecraft is allowed to use.</string>
+            </property>
             <property name="suffix">
              <string> MB</string>
             </property>
@@ -201,6 +204,9 @@
           </item>
           <item row="0" column="1">
            <widget class="QSpinBox" name="minMemSpinBox">
+            <property name="toolTip">
+             <string>The amount of memory Minecraft is started with.</string>
+            </property>
             <property name="suffix">
              <string> MB</string>
             </property>
@@ -220,6 +226,9 @@
           </item>
           <item row="2" column="1">
            <widget class="QSpinBox" name="permGenSpinBox">
+            <property name="toolTip">
+             <string>The amount of memory available to store loaded Java classes.</string>
+            </property>
             <property name="suffix">
              <string> MB</string>
             </property>
diff --git a/gui/dialogs/SettingsDialog.ui b/gui/dialogs/SettingsDialog.ui
index 840e9928..b95b3c8c 100644
--- a/gui/dialogs/SettingsDialog.ui
+++ b/gui/dialogs/SettingsDialog.ui
@@ -599,6 +599,9 @@
          <layout class="QGridLayout" name="gridLayout_2">
           <item row="1" column="1">
            <widget class="QSpinBox" name="maxMemSpinBox">
+            <property name="toolTip">
+             <string>The maximum amount of memory Minecraft is allowed to use.</string>
+            </property>
             <property name="suffix">
              <string> MB</string>
             </property>
@@ -632,6 +635,9 @@
           </item>
           <item row="0" column="1">
            <widget class="QSpinBox" name="minMemSpinBox">
+            <property name="toolTip">
+             <string>The amount of memory Minecraft is started with.</string>
+            </property>
             <property name="suffix">
              <string> MB</string>
             </property>
@@ -658,6 +664,9 @@
           </item>
           <item row="2" column="1">
            <widget class="QSpinBox" name="permGenSpinBox">
+            <property name="toolTip">
+             <string>The amount of memory available to store loaded Java classes.</string>
+            </property>
             <property name="suffix">
              <string> MB</string>
             </property>
@@ -907,7 +916,7 @@
   </connection>
  </connections>
  <buttongroups>
-  <buttongroup name="proxyGroup"/>
   <buttongroup name="sortingModeGroup"/>
+  <buttongroup name="proxyGroup"/>
  </buttongroups>
 </ui>