diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit2.stack/ReValue.pushbutton/ReValueWindow.xaml b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit2.stack/ReValue.pushbutton/ReValueWindow.xaml
index ac5007e29..a05eeffbb 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit2.stack/ReValue.pushbutton/ReValueWindow.xaml
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit2.stack/ReValue.pushbutton/ReValueWindow.xaml
@@ -15,8 +15,26 @@
                           Height="24"
                           SelectionChanged="on_param_change"/>
             </DockPanel>
+            <Expander Header="Guide" Margin="0,5,0,0">
+                <Border Margin="0,5,0,0" Padding="10" CornerRadius="5" Background="{DynamicResource pyRevitAccentBrush}">
+                    <TextBlock TextWrapping="WrapWithOverflow" Margin="0,3,0,0" Foreground="White">
+                    <Bold>By Format</Bold>
+                    <LineBreak />
+                    Specify the existing pattern of the values in the first box and a new format in the second box. For example,
+                        if value is "OVERALL 1ST FLOOR", the first box can contain <Run FontFamily="Consolas">"{type} {lvl}ST {name}"</Run>.
+                        The tool will match the specified format to the value and will extract the parts accordingly. Using the second box,
+                        you can rearrange these extracted parts. In this example, specifying <Run FontFamily="Consolas">"LEVEL {lvl} - {type} {name} PLAN"</Run>
+                        inside the second box will revalue to <Run FontFamily="Consolas">"LEVEL 1 - OVERALL FLOOR PLAN"</Run>
+                    <LineBreak />
+                    <LineBreak />
+                    <Bold>By Regular Expression</Bold>
+                    <LineBreak />
+                    If the first box does not contain a format finder "{}", then the tool works in Find/Replace mode with Regular Expression support.
+                    </TextBlock>
+                </Border>
+            </Expander>
             <DockPanel Margin="0,10,0,0">
-                <TextBlock FontSize="14" Margin="0,0,10,0" Width="100" DockPanel.Dock="Left" VerticalAlignment="Center">Original Format:</TextBlock>
+                <TextBlock FontSize="14" Margin="0,0,10,0" Width="100" DockPanel.Dock="Left" VerticalAlignment="Center">Original Pattern:</TextBlock>
                 <TextBox x:Name="orig_format_tb"
                          Height="24"
                          FontSize="14" FontFamily="Courier New"
@@ -25,7 +43,7 @@
                          TextChanged="on_format_change"/>
             </DockPanel>
             <DockPanel Margin="0,10,0,0">
-                <TextBlock FontSize="14" Margin="0,0,10,0" Width="100" DockPanel.Dock="Left" VerticalAlignment="Center">New Format:</TextBlock>
+                <TextBlock FontSize="14" Margin="0,0,10,0" Width="100" DockPanel.Dock="Left" VerticalAlignment="Center">New Pattern:</TextBlock>
                 <TextBox x:Name="new_format_tb"
                          Height="24"
                          FontSize="14"  FontFamily="Courier New"
@@ -45,13 +63,13 @@
             </Grid.ColumnDefinitions>
             <Button x:Name="apply_b"
                     Margin="5,0,0,0"
-				    Grid.Column="2" Grid.Row="0"
+                    Grid.Column="2" Grid.Row="0"
                     Height="24"
                     Content="Apply New Values"
                     Click="apply_new_values"/>
             <Button x:Name="final_b"
                     Margin="0,0,5,0"
-				    Grid.Column="1" Grid.Row="0"
+                    Grid.Column="1" Grid.Row="0"
                     Height="24"
                     Content="Mark Selected as Final"
                     Click="mark_as_final"/>
diff --git a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit2.stack/ReValue.pushbutton/script.py b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit2.stack/ReValue.pushbutton/script.py
index 623fcf5a7..955b875c6 100644
--- a/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit2.stack/ReValue.pushbutton/script.py
+++ b/extensions/pyRevitTools.extension/pyRevit.tab/Modify.panel/edit2.stack/ReValue.pushbutton/script.py
@@ -1,5 +1,7 @@
 """Reformat parameter string values (Super handy for renaming elements)"""
 #pylint: disable=E0401,W0703,W0613
+import re
+
 from pyrevit import coreutils
 from pyrevit import revit, DB
 from pyrevit import forms
@@ -17,15 +19,23 @@ def __init__(self, eid, oldvalue, final=False):
         self.final = final
         self.tooltip = ''
 
-    def format_value(self, old_format, new_format):
+    def format_value(self, from_pattern, to_pattern):
         try:
-            if old_format and new_format:
-                self.newvalue = coreutils.reformat_string(self.oldvalue,
-                                                          old_format,
-                                                          new_format)
-                self.tooltip = '{} --> {}'.format(old_format, new_format)
+            if from_pattern and to_pattern:
+                # if format contains pattern finders use reformatter
+                if any(x in from_pattern for x in ['{', '}']):
+                    self.newvalue = \
+                        coreutils.reformat_string(self.oldvalue,
+                                                  from_pattern,
+                                                  to_pattern)
+                    self.tooltip = '{} --> {}'.format(from_pattern, to_pattern)
+                # otherwise use a simple find/replacer
+                else:
+                    self.newvalue = \
+                        re.sub(from_pattern, to_pattern, self.oldvalue)
             else:
                 self.tooltip = 'No Conversion Specified'
+                self.newvalue = ''
         except Exception:
             self.newvalue = ''