diff --git a/data/interfaces/default/notifier_config.html b/data/interfaces/default/notifier_config.html
index df2f4cff..c02a34ec 100644
--- a/data/interfaces/default/notifier_config.html
+++ b/data/interfaces/default/notifier_config.html
@@ -113,6 +113,7 @@
                         <div role="tabpanel" class="tab-pane" id="tabs-notify_triggers">
                             <div class="row">
                                 <div class="col-md-12">
+                                    <label>Notification Triggers</label>
                                     <p class="help-block">
                                         Select items that will trigger a notification for this ${notifier['agent_label']} notifiation agent.
                                     </p>
@@ -129,6 +130,7 @@
                             </div>
                         </div>
                         <div role="tabpanel" class="tab-pane" id="tabs-notify_conditions">
+                            <label>Notification Conditions</label>
                             <p class="help-block">
                                 Add custom notification conditions.
                                 <a href="#notify-text-sub-modal" data-toggle="modal">Click here</a> for a description of all the parameters.
@@ -152,6 +154,7 @@
                             </div>
                         </div>
                         <div role="tabpanel" class="tab-pane" id="tabs-notify_text">
+                            <label>Notification Text</label>
                             <p class="help-block">
                                 % if notifier['agent_name'] == 'scripts':
                                 Set the custom arguments passed to the script for each type of notification.
@@ -160,6 +163,10 @@
                                 % endif
                                 <a href="#notify-text-sub-modal" data-toggle="modal">Click here</a> for a list of available parameters which can be used.
                             </p>
+                            <p class="help-block">
+                                You can also add text modifiers to change the case or slice parameters with a list of items.
+                                <a href="#notify-text-modifiers-modal" data-toggle="modal">Click here</a> to view usage information.
+                            </p>
                             <p class="help-block">
                                 You can also add tags to exclude certain text depending on the media type.
                                 <a href="#notify-text-tags-modal" data-toggle="modal">Click here</a> to view usage information.
@@ -219,48 +226,61 @@
                             </ul>
                         </div>
                         <div role="tabpanel" class="tab-pane" id="tabs-test_notifications">
-                            <div class="row">
-                                <div class="col-md-12">
-                                    <p class="help-block">
-                                        Test if ${notifier['agent_label']} notifications are working. Check the <a href="logs">logs</a> for troubleshooting.
-                                    </p>
-                                    <p class="help-block">
-                                        Note: Test with the real values since parameters will not be substituted. 
-                                        (i.e. Use <span class="inline-pre">"Game of Thrones"</span> not <span class="inline-pre">{title}</span>)
-                                    </p>
-                                    % if notifier['agent_name'] == 'scripts':
-                                    <div class="form-group">
-                                        <label for="test_script">Script</label>
+                            <label>Test Notifications</label>
+                            <p class="help-block">
+                                Test if ${notifier['agent_label']} notifications are working. Check the <a href="logs">logs</a> for troubleshooting.
+                            </p>
+                            <p class="help-block">
+                                Note: Test with the real values since parameters will not be substituted. 
+                                (i.e. Use <span class="inline-pre">"Game of Thrones"</span> not <span class="inline-pre">{title}</span>)
+                            </p>
+                            % if notifier['agent_name'] == 'scripts':
+                            <div class="form-group">
+                                <label for="test_script">Script</label>
+                                <div class="row">
+                                    <div class="col-md-12">
                                         <select class="form-control" id="test_script" name="test_script">
                                             % for key, value in sorted(notifier['config_options'][2]['select_options'].iteritems()):
                                             <option value="${key}">${value}</option>
                                             % endfor
                                         </select>
-                                        <p class="help-block">Choose the script to test.</p>
                                     </div>
-                                    <div class="form-group">
-                                        <label for="test_script_args">Script Arguments</label>
+                                </div>
+                                <p class="help-block">Choose the script to test.</p>
+                            </div>
+                            <div class="form-group">
+                                <label for="test_script_args">Script Arguments</label>
+                                <div class="row">
+                                    <div class="col-md-12">
                                         <input class="form-control" type="text" id="test_script_args" name="test_script_args" value="">
-                                        <p class="help-block">Set custom arguments passed to the script.</p>
                                     </div>
-                                    % else:
-                                    <div class="form-group">
-                                        <label for="test_subject">Subject Line</label>
+                                </div>
+                                <p class="help-block">Set custom arguments passed to the script.</p>
+                            </div>
+                            % else:
+                            <div class="form-group">
+                                <label for="test_subject">Subject Line</label>
+                                <div class="row">
+                                    <div class="col-md-12">
                                         <input class="form-control" type="text" id="test_subject" name="test_subject" value="PlexPy">
-                                        <p class="help-block">Set a custom subject line.</p>
                                     </div>
-                                    <div class="form-group">
-                                        <label for="test_body">Message Body</label>
+                                </div>
+                                <p class="help-block">Set a custom subject line.</p>
+                            </div>
+                            <div class="form-group">
+                                <label for="test_body">Message Body</label>
+                                <div class="row">
+                                    <div class="col-md-12">
                                         <input class="form-control" type="text" id="test_body" name="test_body" value="Test notification">
-                                        <p class="help-block">Set a custom body.</p>
                                     </div>
-                                    % endif
-                                    <div class="form-group">
-                                        <div class="row">
-                                            <div class="col-md-8">
-                                                <input type="button" class="btn btn-bright" id="test_notifier" name="test_notifier" value="Test ${notifier['agent_label']}">
-                                            </div>
-                                        </div>
+                                </div>
+                                <p class="help-block">Set a custom body.</p>
+                            </div>
+                            % endif
+                            <div class="form-group">
+                                <div class="row">
+                                    <div class="col-md-8">
+                                        <input type="button" class="btn btn-bright" id="test_notifier" name="test_notifier" value="Test ${notifier['agent_label']}">
                                     </div>
                                 </div>
                             </div>
diff --git a/data/interfaces/default/settings.html b/data/interfaces/default/settings.html
index 7cc04507..fd16b1f5 100644
--- a/data/interfaces/default/settings.html
+++ b/data/interfaces/default/settings.html
@@ -1342,6 +1342,57 @@
         </div>
     </div>
 </div>
+<div id="notify-text-modifiers-modal" class="modal fade" tabindex="-1" role="dialog" aria-labelledby="notify-text-modifiers-modal">
+    <div class="modal-dialog" role="document">
+        <div class="modal-content">
+            <div class="modal-header">
+                <button type="button" class="close" data-dismiss="modal" aria-hidden="true"><i class="fa fa-remove"></i></button>
+                <h4 class="modal-title">Notification Text Modifiers</h4>
+            </div>
+            <div class="modal-body">
+                <div>
+                    <div>
+                        <h4>Case Modifiers</h4>
+                    </div>
+                    <div>
+                        <p class="help-block">Notification parameters with the <span class="inline-pre">!u</span> modifier will be converted to uppercase.</p>
+                        <p><strong style="color: #fff;">Example:</strong></p>
+                        <pre>{video_codec}   --> hevc
+{video_codec!u} --> HEVC</pre>
+                    </div>
+                    <div>
+                        <p class="help-block">Notification parameters with the <span class="inline-pre">!l</span> modifier will be converted to lowercase.</p>
+                        <p><strong style="color: #fff;">Example:</strong></p>
+                        <pre>{content_rating}   --> TV-PG
+{content_rating!l} --> tv-pg</pre>
+                    </div>
+                    <div style="padding-bottom: 10px;">
+                        <p class="help-block">Notification parameters with the <span class="inline-pre">!c</span> modifier will be converted to title case.</p>
+                        <p><strong style="color: #fff;">Example:</strong></p>
+                        <pre>{media_type}   --> movie
+{media_type!c} --> Movie</pre>
+                    </div>
+                    <div>
+                        <h4>List Slicing</h4>
+                    </div>
+                    <div>
+                        <p class="help-block">
+                            Notification parameters which have a list of items can be sliced with a slice formatter <span class="inline-pre">:[X:Y]</span> to limit the number of items.
+                            Note: the first item in the list is numbered <span class="inline-pre">0</span>.
+                        </p>
+                        <p><strong style="color: #fff;">Example:</strong></p>
+                        <pre>{actors:[0]}   --> Only include the 1st actor (Actors: 0)
+{actors:[:4]}  --> Only the first 4 actors (Actors: 0, 1, 2, 3)
+{actors:[2:]}  --> Only the 3rd to last actors (Actors: 2, 3, 4, ...)
+{actors:[1:5]} --> Only the 2nd to 5th actors (Actors: 1, 2, 3, 4)</pre>
+                    </div>
+                </div>
+            </div>
+            <div class="modal-footer">
+            </div>
+        </div>
+    </div>
+</div>
 <div id="notifier-text-preview-modal" class="modal fade" tabindex="-1" role="dialog" aria-labelledby="notifier-text-preview-modal">
 </div>
 <div id="changelog-modal" class="modal fade wide" tabindex="-1" role="dialog" aria-labelledby="changelog-modal">
diff --git a/plexpy/notification_handler.py b/plexpy/notification_handler.py
index 9ca6ecc1..4951c732 100644
--- a/plexpy/notification_handler.py
+++ b/plexpy/notification_handler.py
@@ -21,6 +21,7 @@ import json
 from operator import itemgetter
 import os
 import re
+from string import Formatter
 import threading
 import time
 
@@ -911,9 +912,11 @@ def build_notify_text(subject='', body='', notify_action=None, parameters=None,
     if test:
         return subject, body
 
+    custom_formatter = CustomFormatter()
+
     if agent_id == 15:
         try:
-            script_args = [unicode(arg).format(**parameters) for arg in subject.split()]
+            script_args = [custom_formatter.format(unicode(arg), **parameters) for arg in subject.split()]
         except LookupError as e:
             logger.error(u"PlexPy NotificationHandler :: Unable to parse field %s in script argument. Using fallback." % e)
             script_args = []
@@ -924,7 +927,7 @@ def build_notify_text(subject='', body='', notify_action=None, parameters=None,
         script_args = []
 
     try:
-        subject = unicode(subject).format(**parameters)
+        subject = custom_formatter.format(unicode(subject), **parameters)
     except LookupError as e:
         logger.error(u"PlexPy NotificationHandler :: Unable to parse field %s in notification subject. Using fallback." % e)
         subject = unicode(default_subject).format(**parameters)
@@ -933,7 +936,7 @@ def build_notify_text(subject='', body='', notify_action=None, parameters=None,
         subject = unicode(default_subject).format(**parameters)
 
     try:
-        body = unicode(body).format(**parameters)
+        body = custom_formatter.format(unicode(body), **parameters)
     except LookupError as e:
         logger.error(u"PlexPy NotificationHandler :: Unable to parse field %s in notification body. Using fallback." % e)
         body = unicode(default_body).format(**parameters)
@@ -1179,4 +1182,36 @@ def get_themoviedb_info(rating_key=None, media_type=None, themoviedb_id=None):
         if req_msg:
             logger.debug(u"PlexPy NotificationHandler :: Request response: {}".format(req_msg))
 
-    return themoviedb_json
\ No newline at end of file
+    return themoviedb_json
+
+
+class CustomFormatter(Formatter):
+    def convert_field(self, value, conversion):
+        if conversion is None:
+            return value
+        elif conversion == 's':
+            return str(value)
+        elif conversion == 'r':
+            return repr(value)
+        elif conversion == 'u':  # uppercase
+            return str(value).upper()
+        elif conversion == 'l':  # lowercase
+            return str(value).lower()
+        elif conversion == 'c':  # capitalize
+            return str(value).title()
+        else:
+            return value
+
+    def format_field(self, value, format_spec):
+        if format_spec.startswith('[') and format_spec.endswith(']'):
+            pattern = re.compile(r'\[(\d*):?(\d*)\]')
+            if re.match(pattern, format_spec):  # slice
+                items = [x.strip() for x in str(value).split(',')]
+                slice_start, slice_end = re.search(pattern, format_spec).groups()
+                slice_start = max(int(slice_start), 0) if slice_start else None
+                slice_end = min(int(slice_end), len(items)) if slice_end else None
+                return ', '.join(items[slice_start:slice_end])
+            else:
+                return value
+        else:
+            return super(CustomFormatter, self).format_field(value, format_spec)