diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 0a6fab54f..b250cc8f7 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -111,8 +111,10 @@ def edit_user_registration_path
   def get_allowed_record_type(source)
     return nil if !source.is_a? Source
 
-    if source.record_type == MarcSource::RECORD_TYPES[:source] || source.record_type == MarcSource::RECORD_TYPES[:collection]
+    if source.record_type == MarcSource::RECORD_TYPES[:source]
       [MarcSource::RECORD_TYPES[:collection], MarcSource::RECORD_TYPES[:composite_volume]]
+    elsif source.record_type == MarcSource::RECORD_TYPES[:collection]
+      [MarcSource::RECORD_TYPES[:composite_volume]]
     elsif source.record_type == MarcSource::RECORD_TYPES[:edition_content]
       MarcSource::RECORD_TYPES[:edition]
     else
diff --git a/app/views/editor/_tag_header_buttons.html.erb b/app/views/editor/_tag_header_buttons.html.erb
index ab32bf559..ee3f29c5b 100644
--- a/app/views/editor/_tag_header_buttons.html.erb
+++ b/app/views/editor/_tag_header_buttons.html.erb
@@ -36,11 +36,13 @@
 	<div  class="abuttonset abuttonset-multi">
 		<%if new_window_controller && !empty_header %>
 		<!-- this is a special case, see new_window_select_ujs.js -->
-      <% if selection_record_type != nil && selection_record_type.is_a?(Array) && selection_record_type.count > 1 %>
-        <!-- For some record types, it is necessary to show two different select windows -->
-        <!-- For two different types ot document -->
-       	<a class="abutton ui-state-default abutton-icon-solo ui-corner-all new_window_select" href="#" data-controller="<%=new_window_controller%>" data-new-window-field="<%=new_window_field%>" data-selection-record-type="<%=selection_record_type[0]%>" data-selection-lib-siglum="<%=selection_lib_siglum%>" title="Search Collection"><span class="muscat-ui-icon search-button-collection"></span>_</a>
- 	  	  <a class="abutton ui-state-default abutton-icon-solo ui-corner-all new_window_select" href="#" data-controller="<%=new_window_controller%>" data-new-window-field="<%=new_window_field%>" data-selection-record-type="<%=selection_record_type[1]%>" data-selection-lib-siglum="<%=selection_lib_siglum%>" title="Search Composite"><span class="muscat-ui-icon search-button-composite"></span>_</a>
+      <% if selection_record_type != nil && selection_record_type.is_a?(Array) %>
+        <% if selection_record_type.include?(MarcSource::RECORD_TYPES[:collection])%>
+       	  <a class="abutton ui-state-default abutton-icon-solo ui-corner-all new_window_select" href="#" data-controller="<%=new_window_controller%>" data-new-window-field="<%=new_window_field%>" data-selection-record-type="<%=MarcSource::RECORD_TYPES[:collection]%>" title="Search Collection"><span class="muscat-ui-icon search-button-collection"></span>_</a>
+ 	  	  <% end %>
+        <% if selection_record_type.include?(MarcSource::RECORD_TYPES[:composite_volume])%>
+         <a class="abutton ui-state-default abutton-icon-solo ui-corner-all new_window_select" href="#" data-controller="<%=new_window_controller%>" data-new-window-field="<%=new_window_field%>" data-selection-record-type="<%=MarcSource::RECORD_TYPES[:composite_volume]%>" title="Search Composite"><span class="muscat-ui-icon search-button-composite"></span>_</a>
+        <% end %>
       <% else %>
  	  	  <a class="abutton ui-state-default abutton-icon-solo ui-corner-all new_window_select" href="#" data-controller="<%=new_window_controller%>" data-new-window-field="<%=new_window_field%>" data-selection-record-type="<%=selection_record_type%>" data-selection-lib-siglum="<%=selection_lib_siglum%>" title="Search"><span class="ui-icon ui-icon-search"></span>_</a>
       <% end %>
diff --git a/config/editor_profiles/default/configurations/HoldingBasicLabels.yml b/config/editor_profiles/default/configurations/HoldingBasicLabels.yml
index e31c442c3..0390f0227 100644
--- a/config/editor_profiles/default/configurations/HoldingBasicLabels.yml
+++ b/config/editor_profiles/default/configurations/HoldingBasicLabels.yml
@@ -45,6 +45,11 @@
     a:
       label: records.performer_note
   label: records.note_on_performance
+'525':
+  fields:
+    a:
+      label: records.supplementary_material
+  label: records.supplementary_material
 '541':
   fields:
     a:
diff --git a/config/editor_profiles/default/configurations/HoldingLayoutDefault.yml b/config/editor_profiles/default/configurations/HoldingLayoutDefault.yml
index 102ca3cb1..341d598f0 100644
--- a/config/editor_profiles/default/configurations/HoldingLayoutDefault.yml
+++ b/config/editor_profiles/default/configurations/HoldingLayoutDefault.yml
@@ -35,6 +35,7 @@ groups:
   edit_references:
     all_tags: 
     - '500'
+    - '525'
     - '691'
     - '651'
     - '518'
diff --git a/config/editor_profiles/default/configurations/HoldingLayoutShow.yml b/config/editor_profiles/default/configurations/HoldingLayoutShow.yml
index c9dcca5bc..cccd6927e 100644
--- a/config/editor_profiles/default/configurations/HoldingLayoutShow.yml
+++ b/config/editor_profiles/default/configurations/HoldingLayoutShow.yml
@@ -37,6 +37,7 @@ groups:
   edit_references:
     all_tags: 
     - '500'
+    - '525'
     - '691'
     - '651'
     - '518'
diff --git a/config/editor_profiles/default/configurations/SourceLayoutDefault.yml b/config/editor_profiles/default/configurations/SourceLayoutDefault.yml
index cc9921fd7..c3550578b 100644
--- a/config/editor_profiles/default/configurations/SourceLayoutDefault.yml
+++ b/config/editor_profiles/default/configurations/SourceLayoutDefault.yml
@@ -24,6 +24,7 @@ tag_exclude:
   - '595'
   - '651'
   - '657'
+  - '775'
   - '787'
   edition:
   - '506'
@@ -56,6 +57,7 @@ tag_exclude:
   - '787'
   - '852'
   libretto_source:
+  - '026'
   - '588'
   - '590'
   - '594'
@@ -67,7 +69,7 @@ tag_exclude:
   - '787'
   libretto_edition:
   - '506'
-  - '541'
+  - '525'
   - '541'
   - '561'
   - '563'
@@ -77,17 +79,24 @@ tag_exclude:
   - '596'
   - '598'
   - '773'
+  - '775'
   - '787'
   - '852'
   libretto_edition_content:
   - '506'
+  - '525'
   - '541'
   - '561'
+  - '588'
   - '591'
+  - '594'
+  - '598'
   - '774'
+  - '775'
   - '787'
   - '852'
   theoretica_source:
+  - '026'
   - '588'
   - '590'
   - '594'
@@ -97,9 +106,11 @@ tag_exclude:
   - '651'
   - '657'
   - '774'
+  - '775'
   - '787'
   theoretica_edition:
   - '506'
+  - '525'
   - '541'
   - '561'
   - '563'
@@ -113,6 +124,7 @@ tag_exclude:
   - '657'
   - '772'
   - '773'
+  - '775'
   - '787'
   - '852'
   theoretica_edition_content:
@@ -120,7 +132,10 @@ tag_exclude:
   - '541'
   - '561'
   - '591'
+  - '594'
+  - '598'
   - '774'
+  - '775'
   - '787'
   - '852'
   composite_volume:
diff --git a/config/marc/tag_config_holding.yml b/config/marc/tag_config_holding.yml
index cc32c9854..b34046fe1 100644
--- a/config/marc/tag_config_holding.yml
+++ b/config/marc/tag_config_holding.yml
@@ -74,6 +74,13 @@
     :fields:
     - - a
       - :occurrences: "?"
+  "525":
+    :master: a
+    :indicator: "##"
+    :occurrences: "*"
+    :fields:
+    - - a
+      - :occurrences: "?"
   "541":
     :master: a
     :indicator: "1#"
diff --git a/config/marc/tag_config_source.yml b/config/marc/tag_config_source.yml
index 4d8789180..925daf9f4 100644
--- a/config/marc/tag_config_source.yml
+++ b/config/marc/tag_config_source.yml
@@ -339,13 +339,6 @@
       - :occurrences: "?"
     - - c
       - :occurrences: "?"
-  "511":
-    :master: a
-    :indicator: "0#"
-    :occurrences: "*"
-    :fields:
-    - - a
-      - :occurrences: "?"
   "518":
     :master: a
     :indicator: "##"
diff --git a/config/marc_index/index_config_source.yml b/config/marc_index/index_config_source.yml
index 91d8c4a3a..81944eea5 100644
--- a/config/marc_index/index_config_source.yml
+++ b/config/marc_index/index_config_source.yml
@@ -110,7 +110,6 @@ fields:
   "508a":
   "510a":
   "510c":
-  "511a":
   "518a":
       :holding_record: true
   "520a":