diff --git a/BFR/MainWindow.xaml b/BFR/MainWindow.xaml
index 4e63193..9b17ff9 100644
--- a/BFR/MainWindow.xaml
+++ b/BFR/MainWindow.xaml
@@ -11,20 +11,20 @@
     <!-- Directory Selection + Filters -->
     <Border Grid.Row="0" Grid.ColumnSpan="3">
       <Grid RowDefinitions="*,auto" ColumnDefinitions="auto,*,auto">
-        <Expander Grid.Column="0" Name="FilterExpander" Header="Filter"/>
+        <Expander Grid.Column="0" Name="FilterExpander" Header="Filter" ToolTip.Tip="Various options for filtering the files to be modified."/>
         <TextBox Grid.Column="1" IsEnabled="False" Text="{Binding WorkingDirectory}"/>
-        <Button  Grid.Column="2" Content=" ... " Command="{Binding OpenDirectoryButtonClick}"/>
+        <Button  Grid.Column="2" Content=" ... " Command="{Binding OpenDirectoryButtonClick}" ToolTip.Tip="Loads all files from a specific folder."/>
         
         <!-- Filters -->
         <Grid Grid.Row="1" Grid.ColumnSpan="3" ColumnDefinitions="auto,*,auto,*,auto,auto,auto,auto" IsVisible="{Binding #FilterExpander.IsExpanded}">
           <TextBlock Grid.Column="0" Text="Extension:"/>
-          <TextBox Grid.Column="1" Text="{Binding FilterExtension}" PropertyChanged="FilterChanged"/>
+          <TextBox Grid.Column="1" Text="{Binding FilterExtension}" PropertyChanged="FilterChanged" ToolTip.Tip="Matches the file extension *exactly*."/>
           <TextBlock Grid.Column="2" Text="Name:"/>
-          <TextBox Grid.Column="3" Text="{Binding FilterPattern}" PropertyChanged="FilterChanged"/>
+          <TextBox Grid.Column="3" Text="{Binding FilterPattern}" PropertyChanged="FilterChanged" ToolTip.Tip="Matches against a part of the file name."/>
           <TextBlock Grid.Column="4" Text="Full Name:"/>
-          <CheckBox Grid.Column="5" IsChecked="{Binding FilterFullName}" PropertyChanged="FilterChanged"/>
+          <CheckBox Grid.Column="5" IsChecked="{Binding FilterFullName}" PropertyChanged="FilterChanged" ToolTip.Tip="Whether to include the file extension."/>
           <TextBlock Grid.Column="6" Text="Regex:"/>
-          <CheckBox Grid.Column="7" IsChecked="{Binding FilterRegex}" PropertyChanged="FilterChanged" Margin="4,4,5,4"/>
+          <CheckBox Grid.Column="7" IsChecked="{Binding FilterRegex}" PropertyChanged="FilterChanged" Margin="4,4,5,4" ToolTip.Tip="Whether to match using RegEx."/>
         </Grid>
       </Grid>
     </Border>
@@ -59,18 +59,18 @@
       <Border Grid.Row="1" Classes="ConnectUp">
         <Grid ColumnDefinitions="auto,*,auto,auto,auto">
           <TextBlock Grid.Column="0" Text="New:"/>
-          <ComboBox Grid.Column="1" Items="{Binding OperationTypes}" SelectedIndex="{Binding SelectedOperationType}"/>
-          <Button Grid.Column="2" Content=" + " Command="{Binding AddOperation}"/>
-          <Button Grid.Column="3" Content=" - " Command="{Binding RemoveOperation}"/>
-          <ButtonSpinner Grid.Column="4" Spin="MoveOperation"/>
+          <ComboBox Grid.Column="1" Items="{Binding OperationTypes}" SelectedIndex="{Binding SelectedOperationType}" ToolTip.Tip="The type of the operation to add."/>
+          <Button Grid.Column="2" Content=" + " Command="{Binding AddOperation}" ToolTip.Tip="Adds a new operation after the one selected (or at the end)."/>
+          <Button Grid.Column="3" Content=" - " Command="{Binding RemoveOperation}" ToolTip.Tip="Removes the selected operation (or the first one)."/>
+          <ButtonSpinner Grid.Column="4" Spin="MoveOperation" ToolTip.Tip="Moves the selected operation (or the first one)."/>
         </Grid>
       </Border>
       
       <!-- Commit and Undo Buttons -->
       <Border Grid.Row="2" Classes="ConnectUp">
         <Grid ColumnDefinitions="*,*">
-          <Button Grid.Column="0" Content="Undo" Command="{Binding Undo}" IsEnabled="{Binding !!UndoCount}"/>
-          <Button Grid.Column="1" Content="Rename All" Command="{Binding Commit}" IsEnabled="{Binding IsCommitButtonEnabled}"/>
+          <Button Grid.Column="0" Content="Undo" Command="{Binding Undo}" IsEnabled="{Binding !!UndoCount}" ToolTip.Tip="Undoes the last operation. Works multiple times."/>
+          <Button Grid.Column="1" Content="Rename All" Command="{Binding Commit}" IsEnabled="{Binding IsCommitButtonEnabled}" ToolTip.Tip="Renames all the files according to the preview. This button is disabled if the preview is invalid."/>
         </Grid>
       </Border>
     </Grid>
@@ -133,8 +133,8 @@
       <Setter Property="Header">
         <Template>
           <Grid ColumnDefinitions="auto,*,auto">
-            <CheckBox  Grid.Column="0" Margin="0,0,8,0" IsChecked="{Binding IsEnabled}" Command="{Binding $parent[6].DataContext.Preview}"/>
-            <TextBlock Grid.Column="1" Margin="0,0,8,0" Text="{Binding Name}"/>
+            <CheckBox  Grid.Column="0" Margin="0,0,8,0" IsChecked="{Binding IsEnabled}" Command="{Binding $parent[6].DataContext.Preview}" ToolTip.Tip="Enable/Disable the operation."/>
+            <TextBlock Grid.Column="1" Margin="0,0,8,0" Text="{Binding Name}" ToolTip.Tip="Click here to expand, or further to the side to select this operation."/>
             <Grid Grid.Column="2" ToolTip.Tip="{Binding Error}" IsVisible="{Binding !!Error.Length}">
               <Ellipse   Width="18" Height="18" Margin="0" Stroke="DarkRed" StrokeThickness="2"/>
               <TextBlock Width="18" Height="18" Margin="0" Foreground="DarkRed" Text="!" FontWeight="Black" TextAlignment="Center"/>
@@ -148,7 +148,7 @@
   <Window.DataTemplates>
     <!-- Operation Type (For the selector) -->
     <DataTemplate DataType="{x:Type ops:OperationType}">
-      <TextBlock Text="{Binding Name}"/>
+      <TextBlock Text="{Binding Name}" ToolTip.Tip="{Binding Description}"/>
     </DataTemplate>
 
     <!-- Operations -->
@@ -156,9 +156,9 @@
       <Expander Classes="OperationExpander">
         <Grid ColumnDefinitions="auto,*" RowDefinitions="*,*">
           <TextBlock Grid.Row="0" Text="Replacement:"/>
-          <TextBox Grid.Row="0" Text="{Binding Replacement}" PropertyChanged="PreviewChanged"/>
+          <TextBox Grid.Row="0" Text="{Binding Replacement}" PropertyChanged="PreviewChanged" ToolTip.Tip="The text to overwrite the entire file name with."/>
           <TextBlock Grid.Row="1" Text="Full Name:"/>
-          <CheckBox Grid.Row="1" IsChecked="{Binding FullName}" PropertyChanged="PreviewChanged"/>
+          <CheckBox Grid.Row="1" IsChecked="{Binding FullName}" PropertyChanged="PreviewChanged" ToolTip.Tip="Whether to overwrite the file extension as well."/>
         </Grid>
       </Expander>
     </DataTemplate>
@@ -166,33 +166,31 @@
       <Expander Classes="OperationExpander">
         <Grid ColumnDefinitions="auto,*" RowDefinitions="auto,auto,auto,auto,auto,auto,auto,auto,auto,auto,auto">
           <TextBlock Grid.Row="0" Text="Mode:"/>
-          <ComboBox Grid.Row="0" Items="{Binding Modes}" Name="ModeSelector" SelectedIndex="{Binding Mode}" PropertyChanged="PreviewChanged">
+          <ComboBox Grid.Row="0" Items="{Binding Modes}" Name="ModeSelector" SelectedIndex="{Binding Mode}" PropertyChanged="PreviewChanged" ToolTip.Tip="How to select the parts removed.">
             <ComboBox.ItemTemplate>
               <DataTemplate>
-                <TextBlock Text="{Binding Name}"/>
+                <TextBlock Text="{Binding Name}" ToolTip.Tip="{Binding Description}"/>
               </DataTemplate>
             </ComboBox.ItemTemplate>
           </ComboBox>
           <TextBlock Grid.Row="1" Text="Pattern:" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}"/>
-          <TextBox Grid.Row="1" Text="{Binding Pattern}" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}" PropertyChanged="PreviewChanged"/>
+          <TextBox Grid.Row="1" Text="{Binding Pattern}" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}" PropertyChanged="PreviewChanged" ToolTip.Tip="The pattern to remove."/>
           <TextBlock Grid.Row="2" Text="Characters:" IsVisible="{Binding #ModeSelector.SelectedItem.IsCharacters}"/>
-          <TextBox Grid.Row="2" Text="{Binding Characters}" IsVisible="{Binding #ModeSelector.SelectedItem.IsCharacters}" PropertyChanged="PreviewChanged"/>
+          <TextBox Grid.Row="2" Text="{Binding Characters}" IsVisible="{Binding #ModeSelector.SelectedItem.IsCharacters}" PropertyChanged="PreviewChanged" ToolTip.Tip="All the characters to remove."/>
           <TextBlock Grid.Row="3" Text="From N:" IsVisible="{Binding #ModeSelector.SelectedItem.IsFromNToN}"/>
-          <NumericUpDown Grid.Row="3" Value="{Binding FromN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsFromNToN}" PropertyChanged="PreviewChanged"/>
+          <NumericUpDown Grid.Row="3" Value="{Binding FromN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsFromNToN}" PropertyChanged="PreviewChanged" ToolTip.Tip="Zero-based start index for the part to remove."/>
           <TextBlock Grid.Row="4" Text="To N:" IsVisible="{Binding #ModeSelector.SelectedItem.IsFromNToN}"/>
-          <NumericUpDown Grid.Row="4" Value="{Binding ToN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsFromNToN}" PropertyChanged="PreviewChanged"/>
+          <NumericUpDown Grid.Row="4" Value="{Binding ToN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsFromNToN}" PropertyChanged="PreviewChanged" ToolTip.Tip="Zero-based end index for the part to remove."/>
           <TextBlock Grid.Row="5" Text="First N:" IsVisible="{Binding #ModeSelector.SelectedItem.IsFirstN}"/>
-          <NumericUpDown Grid.Row="5" Value="{Binding FirstN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsFirstN}" PropertyChanged="PreviewChanged"/>
+          <NumericUpDown Grid.Row="5" Value="{Binding FirstN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsFirstN}" PropertyChanged="PreviewChanged" ToolTip.Tip="The number of characters to remove at the start of the file name."/>
           <TextBlock Grid.Row="6" Text="Last N:" IsVisible="{Binding #ModeSelector.SelectedItem.IsLastN}"/>
-          <NumericUpDown Grid.Row="6" Value="{Binding LastN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsLastN}" PropertyChanged="PreviewChanged"/>
-          <!--TextBlock Grid.Row="7" Text="Replacement:"/>
-          <TextBox Grid.Row="7" Text="{Binding Replacement}" PropertyChanged="PreviewChanged"/-->
+          <NumericUpDown Grid.Row="6" Value="{Binding LastN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsLastN}" PropertyChanged="PreviewChanged" ToolTip.Tip="The number of characters to remove at the end of the file name."/>
+
           <TextBlock Grid.Row="8" Text="Regex:" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}"/>
-          <CheckBox Grid.Row="8" IsChecked="{Binding UseRegex}" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}" PropertyChanged="PreviewChanged"/>
-          <TextBlock Grid.Row="9" Text="Replace Regex:" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}"/>
-          <CheckBox Grid.Row="9" IsChecked="{Binding UseRegexReplace}" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}" PropertyChanged="PreviewChanged"/>
+          <CheckBox Grid.Row="8" IsChecked="{Binding UseRegex}" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}" PropertyChanged="PreviewChanged" ToolTip.Tip="Whether to match using RegEx."/>
+
           <TextBlock Grid.Row="10" Text="Full Name:"/>
-          <CheckBox Grid.Row="10" IsChecked="{Binding FullName}" PropertyChanged="PreviewChanged"/>
+          <CheckBox Grid.Row="10" IsChecked="{Binding FullName}" PropertyChanged="PreviewChanged" ToolTip.Tip="Whether to consider the file extension as well."/>
         </Grid>
       </Expander>
     </DataTemplate>
@@ -200,33 +198,33 @@
       <Expander Classes="OperationExpander">
         <Grid ColumnDefinitions="auto,*" RowDefinitions="auto,auto,auto,auto,auto,auto,auto,auto,auto,auto,auto">
           <TextBlock Grid.Row="0" Text="Mode:"/>
-          <ComboBox Grid.Row="0" Items="{Binding Modes}" Name="ModeSelector" SelectedIndex="{Binding Mode}" PropertyChanged="PreviewChanged">
+          <ComboBox Grid.Row="0" Items="{Binding Modes}" Name="ModeSelector" SelectedIndex="{Binding Mode}" PropertyChanged="PreviewChanged" ToolTip.Tip="How to select the parts replaced.">
             <ComboBox.ItemTemplate>
               <DataTemplate>
-                <TextBlock Text="{Binding Name}"/>
+                <TextBlock Text="{Binding Name}" ToolTip.Tip="{Binding Description}"/>
               </DataTemplate>
             </ComboBox.ItemTemplate>
           </ComboBox>
           <TextBlock Grid.Row="1" Text="Pattern:" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}"/>
-          <TextBox Grid.Row="1" Text="{Binding Pattern}" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}" PropertyChanged="PreviewChanged"/>
+          <TextBox Grid.Row="1" Text="{Binding Pattern}" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}" PropertyChanged="PreviewChanged" ToolTip.Tip="The pattern to replace."/>
           <TextBlock Grid.Row="2" Text="Characters:" IsVisible="{Binding #ModeSelector.SelectedItem.IsCharacters}"/>
-          <TextBox Grid.Row="2" Text="{Binding Characters}" IsVisible="{Binding #ModeSelector.SelectedItem.IsCharacters}" PropertyChanged="PreviewChanged"/>
+          <TextBox Grid.Row="2" Text="{Binding Characters}" IsVisible="{Binding #ModeSelector.SelectedItem.IsCharacters}" PropertyChanged="PreviewChanged" ToolTip.Tip="All the characters to replace."/>
           <TextBlock Grid.Row="3" Text="From N:" IsVisible="{Binding #ModeSelector.SelectedItem.IsFromNToN}"/>
-          <NumericUpDown Grid.Row="3" Value="{Binding FromN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsFromNToN}" PropertyChanged="PreviewChanged"/>
+          <NumericUpDown Grid.Row="3" Value="{Binding FromN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsFromNToN}" PropertyChanged="PreviewChanged" ToolTip.Tip="Zero-based start index for the part to replace."/>
           <TextBlock Grid.Row="4" Text="To N:" IsVisible="{Binding #ModeSelector.SelectedItem.IsFromNToN}"/>
-          <NumericUpDown Grid.Row="4" Value="{Binding ToN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsFromNToN}" PropertyChanged="PreviewChanged"/>
+          <NumericUpDown Grid.Row="4" Value="{Binding ToN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsFromNToN}" PropertyChanged="PreviewChanged" ToolTip.Tip="Zero-based end index for the part to replace."/>
           <TextBlock Grid.Row="5" Text="First N:" IsVisible="{Binding #ModeSelector.SelectedItem.IsFirstN}"/>
-          <NumericUpDown Grid.Row="5" Value="{Binding FirstN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsFirstN}" PropertyChanged="PreviewChanged"/>
+          <NumericUpDown Grid.Row="5" Value="{Binding FirstN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsFirstN}" PropertyChanged="PreviewChanged" ToolTip.Tip="The number of characters to replace at the start of the file name."/>
           <TextBlock Grid.Row="6" Text="Last N:" IsVisible="{Binding #ModeSelector.SelectedItem.IsLastN}"/>
-          <NumericUpDown Grid.Row="6" Value="{Binding LastN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsLastN}" PropertyChanged="PreviewChanged"/>
+          <NumericUpDown Grid.Row="6" Value="{Binding LastN}" IsVisible="{Binding #ModeSelector.SelectedItem.IsLastN}" PropertyChanged="PreviewChanged" ToolTip.Tip="The number of characters to replace at the end of the file name."/>
           <TextBlock Grid.Row="7" Text="Replacement:"/>
-          <TextBox Grid.Row="7" Text="{Binding Replacement}" PropertyChanged="PreviewChanged"/>
+          <TextBox Grid.Row="7" Text="{Binding Replacement}" PropertyChanged="PreviewChanged" ToolTip.Tip="The replacement to insert at the matched position/-s."/>
           <TextBlock Grid.Row="8" Text="Regex:" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}"/>
-          <CheckBox Grid.Row="8" IsChecked="{Binding UseRegex}" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}" PropertyChanged="PreviewChanged"/>
+          <CheckBox Grid.Row="8" IsChecked="{Binding UseRegex}" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}" PropertyChanged="PreviewChanged" ToolTip.Tip="Whether to match using RegEx."/>
           <TextBlock Grid.Row="9" Text="Replace Regex:" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}"/>
-          <CheckBox Grid.Row="9" IsChecked="{Binding UseRegexReplace}" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}" PropertyChanged="PreviewChanged"/>
+          <CheckBox Grid.Row="9" IsChecked="{Binding UseRegexReplace}" IsVisible="{Binding #ModeSelector.SelectedItem.IsPattern}" PropertyChanged="PreviewChanged" ToolTip.Tip="Whether to consider Replacement as a RegEx replacement string ($)."/>
           <TextBlock Grid.Row="10" Text="Full Name:"/>
-          <CheckBox Grid.Row="10" IsChecked="{Binding FullName}" PropertyChanged="PreviewChanged"/>
+          <CheckBox Grid.Row="10" IsChecked="{Binding FullName}" PropertyChanged="PreviewChanged" ToolTip.Tip="Whether to consider the file extension as well."/>
         </Grid>
       </Expander>
     </DataTemplate>
@@ -234,29 +232,29 @@
       <Expander Classes="OperationExpander">
         <Grid ColumnDefinitions="auto,*" RowDefinitions="auto,auto,auto,auto,auto,auto,auto,auto,auto">
           <TextBlock Grid.Row="0" Text="Mode:"/>
-          <ComboBox Grid.Row="0" Items="{Binding Modes}" Name="ModeSelector" SelectedIndex="{Binding Mode}" PropertyChanged="PreviewChanged">
+          <ComboBox Grid.Row="0" Items="{Binding Modes}" Name="ModeSelector" SelectedIndex="{Binding Mode}" PropertyChanged="PreviewChanged" ToolTip.Tip="Where to insert the numbering.">
             <ComboBox.ItemTemplate>
               <DataTemplate>
-                <TextBlock Text="{Binding Name}"/>
+                <TextBlock Text="{Binding Name}" ToolTip.Tip="{Binding Description}"/>
               </DataTemplate>
             </ComboBox.ItemTemplate>
           </ComboBox>
           <TextBlock Grid.Row="1" Text="Pattern:" IsVisible="{Binding #ModeSelector.SelectedItem.IsReplace}"/>
-          <TextBox Grid.Row="1" Text="{Binding Pattern}" IsVisible="{Binding #ModeSelector.SelectedItem.IsReplace}" PropertyChanged="PreviewChanged"/>
+          <TextBox Grid.Row="1" Text="{Binding Pattern}" IsVisible="{Binding #ModeSelector.SelectedItem.IsReplace}" PropertyChanged="PreviewChanged" ToolTip.Tip="The pattern to replace with the numbering."/>
           <TextBlock Grid.Row="2" Text="Position:" IsVisible="{Binding #ModeSelector.SelectedItem.IsInsert}"/>
-          <NumericUpDown Grid.Row="2" Value="{Binding InsertPosition}" IsVisible="{Binding #ModeSelector.SelectedItem.IsInsert}" PropertyChanged="PreviewChanged"/>
+          <NumericUpDown Grid.Row="2" Value="{Binding InsertPosition}" IsVisible="{Binding #ModeSelector.SelectedItem.IsInsert}" PropertyChanged="PreviewChanged" ToolTip.Tip="The zero-based index where to insert the numbering."/>
           <TextBlock Grid.Row="3" Text="Start Index:"/>
-          <NumericUpDown Grid.Row="3" Value="{Binding StartIndex}" PropertyChanged="PreviewChanged"/>
+          <NumericUpDown Grid.Row="3" Value="{Binding StartIndex}" PropertyChanged="PreviewChanged" ToolTip.Tip="The number of the first file name."/>
           <TextBlock Grid.Row="4" Text="Increment:"/>
-          <NumericUpDown Grid.Row="4" Value="{Binding Increment}" PropertyChanged="PreviewChanged"/>
+          <NumericUpDown Grid.Row="4" Value="{Binding Increment}" PropertyChanged="PreviewChanged" ToolTip.Tip="The increment to each successive file name (can be negative)."/>
           <TextBlock Grid.Row="5" Text="Padding:"/>
-          <NumericUpDown Grid.Row="5" Value="{Binding Padding}" PropertyChanged="PreviewChanged"/>
+          <NumericUpDown Grid.Row="5" Value="{Binding Padding}" PropertyChanged="PreviewChanged" ToolTip.Tip="The minimum number of digits for each number (pads with 0s)."/>
           <TextBlock Grid.Row="6" Text="Auto Padding:"/>
-          <CheckBox Grid.Row="6" IsChecked="{Binding AutoPadding}" PropertyChanged="PreviewChanged"/>
+          <CheckBox Grid.Row="6" IsChecked="{Binding AutoPadding}" PropertyChanged="PreviewChanged" ToolTip.Tip="Whether to automatically apply padding based on the highest number."/>
           <TextBlock Grid.Row="7" Text="Regex:" IsVisible="{Binding #ModeSelector.SelectedItem.IsReplace}"/>
-          <CheckBox Grid.Row="7" IsChecked="{Binding UseRegex}" IsVisible="{Binding #ModeSelector.SelectedItem.IsReplace}" PropertyChanged="PreviewChanged"/>
-          <TextBlock Grid.Row="8" Text="Full Name:" IsVisible="{Binding #ModeSelector.SelectedItem.IsReplace}"/>
-          <CheckBox Grid.Row="8" IsChecked="{Binding FullName}" IsVisible="{Binding #ModeSelector.SelectedItem.IsReplace}" PropertyChanged="PreviewChanged"/>
+          <CheckBox Grid.Row="7" IsChecked="{Binding UseRegex}" IsVisible="{Binding #ModeSelector.SelectedItem.IsReplace}" PropertyChanged="PreviewChanged" ToolTip.Tip="Whether to match using RegEx."/>
+          <TextBlock Grid.Row="8" Text="Full Name:"/>
+          <CheckBox Grid.Row="8" IsChecked="{Binding FullName}" PropertyChanged="PreviewChanged" ToolTip.Tip="Whether to consider the file extension as well."/>
         </Grid>
       </Expander>
     </DataTemplate>
@@ -264,19 +262,19 @@
       <Expander Classes="OperationExpander">
         <Grid ColumnDefinitions="auto,*" RowDefinitions="auto,auto,auto,auto">
           <TextBlock Grid.Row="0" Text="Mode:"/>
-          <ComboBox Grid.Row="0" Items="{Binding Modes}" Name="ModeSelector" SelectedIndex="{Binding Mode}" PropertyChanged="PreviewChanged">
+          <ComboBox Grid.Row="0" Items="{Binding Modes}" Name="ModeSelector" SelectedIndex="{Binding Mode}" PropertyChanged="PreviewChanged" ToolTip.Tip="Where to add the new text.">
             <ComboBox.ItemTemplate>
               <DataTemplate>
-                <TextBlock Text="{Binding Name}"/>
+                <TextBlock Text="{Binding Name}" ToolTip.Tip="{Binding Description}"/>
               </DataTemplate>
             </ComboBox.ItemTemplate>
           </ComboBox>
           <TextBlock Grid.Row="1" Text="Position:" IsVisible="{Binding #ModeSelector.SelectedItem.IsInsert}"/>
-          <NumericUpDown Grid.Row="1" Value="{Binding InsertPosition}" IsVisible="{Binding #ModeSelector.SelectedItem.IsInsert}" PropertyChanged="PreviewChanged"/>
+          <NumericUpDown Grid.Row="1" Value="{Binding InsertPosition}" IsVisible="{Binding #ModeSelector.SelectedItem.IsInsert}" PropertyChanged="PreviewChanged" ToolTip.Tip="The zero-based index at which to insert the new text."/>
           <TextBlock Grid.Row="2" Text="Text:"/>
-          <TextBox Grid.Row="2" Text="{Binding Text}" PropertyChanged="PreviewChanged"/>
+          <TextBox Grid.Row="2" Text="{Binding Text}" PropertyChanged="PreviewChanged" ToolTip.Tip="The text to add to the file name."/>
           <TextBlock Grid.Row="3" Text="Full Name:"/>
-          <CheckBox Grid.Row="3" IsChecked="{Binding FullName}" PropertyChanged="PreviewChanged"/>
+          <CheckBox Grid.Row="3" IsChecked="{Binding FullName}" PropertyChanged="PreviewChanged" ToolTip.Tip="Whether to consider the file extension as well."/>
         </Grid>
       </Expander>
     </DataTemplate>
@@ -284,17 +282,17 @@
       <Expander Classes="OperationExpander">
         <Grid ColumnDefinitions="auto,*" RowDefinitions="auto,auto,auto">
           <TextBlock Grid.Row="0" Text="Mode:"/>
-          <ComboBox Grid.Row="0" Items="{Binding Modes}" Name="ModeSelector" SelectedIndex="{Binding Mode}" PropertyChanged="PreviewChanged">
+          <ComboBox Grid.Row="0" Items="{Binding Modes}" Name="ModeSelector" SelectedIndex="{Binding Mode}" PropertyChanged="PreviewChanged" ToolTip.Tip="The method that is used to compare and sort the file names.">
             <ComboBox.ItemTemplate>
               <DataTemplate>
-                <TextBlock Text="{Binding Name}"/>
+                <TextBlock Text="{Binding Name}" ToolTip.Tip="{Binding Description}"/>
               </DataTemplate>
             </ComboBox.ItemTemplate>
           </ComboBox>
           <TextBlock Grid.Row="1" Text="Direction:" IsVisible="{Binding !#ModeSelector.SelectedItem.IsReverse}"/>
-          <ComboBox Grid.Row="1" Items="{Binding Directions}" SelectedIndex="{Binding Direction}" IsVisible="{Binding !#ModeSelector.SelectedItem.IsReverse}" PropertyChanged="PreviewChanged"/>
+          <ComboBox Grid.Row="1" Items="{Binding Directions}" SelectedIndex="{Binding Direction}" IsVisible="{Binding !#ModeSelector.SelectedItem.IsReverse}" PropertyChanged="PreviewChanged" ToolTip.Tip="Whether to sort in ascending or descending order."/>
           <TextBlock Grid.Row="2" Text="Full Name:" IsVisible="{Binding !#ModeSelector.SelectedItem.IsReverse}"/>
-          <CheckBox Grid.Row="2" IsChecked="{Binding FullName}" IsVisible="{Binding !#ModeSelector.SelectedItem.IsReverse}" PropertyChanged="PreviewChanged"/>
+          <CheckBox Grid.Row="2" IsChecked="{Binding FullName}" IsVisible="{Binding !#ModeSelector.SelectedItem.IsReverse}" PropertyChanged="PreviewChanged" ToolTip.Tip="Whether to consider the file extension as well."/>
         </Grid>
       </Expander>
     </DataTemplate>