diff --git a/CHANGELOG.md b/CHANGELOG.md
index be3982fb06c..a262139b69b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -54,7 +54,7 @@ We refer to [GitHub issues](https://github.com/JabRef/jabref/issues) by using `#
 - We added the ability to execute default action in dialog by using with <kbd>Ctrl</kbd> + <kbd>Enter</kbd> combination [#4496](https://github.com/JabRef/jabref/issues/4496)
 - We grouped and reordered the Main Menu (File, Edit, Library, Quality, Tools, and View tabs & icons). [#4666](https://github.com/JabRef/jabref/issues/4666) [#4667](https://github.com/JabRef/jabref/issues/4667) [#4668](https://github.com/JabRef/jabref/issues/4668) [#4669](https://github.com/JabRef/jabref/issues/4669) [#4670](https://github.com/JabRef/jabref/issues/4670) [#4671](https://github.com/JabRef/jabref/issues/4671) [#4672](https://github.com/JabRef/jabref/issues/4672) [#4673](https://github.com/JabRef/jabref/issues/4673)
 - We added additional modifiers (capitalize, titlecase and sentencecase) to the Bibtex key generator. [#1506](https://github.com/JabRef/jabref/issues/1506)
-
+- We grouped the toolbar icons and changed the Open Library and Copy icons. [#4584](https://github.com/JabRef/jabref/issues/4584) 
 
 
 ### Fixed
diff --git a/src/main/java/org/jabref/gui/Base.css b/src/main/java/org/jabref/gui/Base.css
index e9c36458ba8..14c7861eb45 100644
--- a/src/main/java/org/jabref/gui/Base.css
+++ b/src/main/java/org/jabref/gui/Base.css
@@ -825,7 +825,7 @@
 .separator:vertical .line {
     -fx-border-color: -jr-separator;
     -fx-border-width: 1;
-    -fx-border-insets: 0 0 0 1;
+    -fx-border-insets: 5 15 5 15;
 }
 
 .mainToolbar {
diff --git a/src/main/java/org/jabref/gui/JabRefFrame.java b/src/main/java/org/jabref/gui/JabRefFrame.java
index 81290cfaab2..e80c93d9386 100644
--- a/src/main/java/org/jabref/gui/JabRefFrame.java
+++ b/src/main/java/org/jabref/gui/JabRefFrame.java
@@ -25,6 +25,7 @@
 import javafx.beans.value.ChangeListener;
 import javafx.beans.value.ObservableValue;
 import javafx.collections.ListChangeListener;
+import javafx.geometry.Orientation;
 import javafx.scene.Node;
 import javafx.scene.control.Alert;
 import javafx.scene.control.Button;
@@ -33,6 +34,7 @@
 import javafx.scene.control.Menu;
 import javafx.scene.control.MenuBar;
 import javafx.scene.control.ProgressBar;
+import javafx.scene.control.Separator;
 import javafx.scene.control.SeparatorMenuItem;
 import javafx.scene.control.SplitPane;
 import javafx.scene.control.Tab;
@@ -608,21 +610,21 @@ private Node createToolbar() {
         leftSide.setMinWidth(100);
         leftSide.prefWidthProperty().bind(sidePane.widthProperty());
         leftSide.maxWidthProperty().bind(sidePane.widthProperty());
-
         PushToApplicationButton pushToExternal = new PushToApplicationButton(this, pushApplications.getApplications());
         HBox rightSide = new HBox(
                 factory.createIconButton(StandardActions.NEW_ARTICLE, new NewEntryAction(this, BiblatexEntryTypes.ARTICLE, dialogService, Globals.prefs)),
                 factory.createIconButton(StandardActions.DELETE_ENTRY, new OldDatabaseCommandWrapper(Actions.DELETE, this, Globals.stateManager)),
-
+                new Separator(Orientation.VERTICAL),
                 factory.createIconButton(StandardActions.UNDO, new OldDatabaseCommandWrapper(Actions.UNDO, this, Globals.stateManager)),
                 factory.createIconButton(StandardActions.REDO, new OldDatabaseCommandWrapper(Actions.REDO, this, Globals.stateManager)),
                 factory.createIconButton(StandardActions.CUT, new OldDatabaseCommandWrapper(Actions.CUT, this, Globals.stateManager)),
                 factory.createIconButton(StandardActions.COPY, new OldDatabaseCommandWrapper(Actions.COPY, this, Globals.stateManager)),
                 factory.createIconButton(StandardActions.PASTE, new OldDatabaseCommandWrapper(Actions.PASTE, this, Globals.stateManager)),
-
-                factory.createIconButton(StandardActions.CLEANUP_ENTRIES, new OldDatabaseCommandWrapper(Actions.CLEANUP, this, Globals.stateManager)),
+                new Separator(Orientation.VERTICAL),
                 factory.createIconButton(pushToExternal.getMenuAction(), pushToExternal),
-
+                factory.createIconButton(StandardActions.GENERATE_CITE_KEYS, new OldDatabaseCommandWrapper(Actions.MAKE_KEY, this, Globals.stateManager)),
+                factory.createIconButton(StandardActions.CLEANUP_ENTRIES, new OldDatabaseCommandWrapper(Actions.CLEANUP, this, Globals.stateManager)),
+                new Separator(Orientation.VERTICAL),
                 factory.createIconButton(StandardActions.FORK_ME, new OpenBrowserAction("https://github.com/JabRef/jabref")),
                 factory.createIconButton(StandardActions.OPEN_FACEBOOK, new OpenBrowserAction("https://www.facebook.com/JabRef/")),
                 factory.createIconButton(StandardActions.OPEN_TWITTER, new OpenBrowserAction("https://twitter.com/jabref_org"))
diff --git a/src/main/java/org/jabref/gui/actions/StandardActions.java b/src/main/java/org/jabref/gui/actions/StandardActions.java
index 302bc7359bd..f6e843de78d 100644
--- a/src/main/java/org/jabref/gui/actions/StandardActions.java
+++ b/src/main/java/org/jabref/gui/actions/StandardActions.java
@@ -61,8 +61,8 @@ public enum StandardActions implements Action {
     RELEVANCE(Localization.lang("Relevance"), IconTheme.JabRefIcons.RELEVANCE),
     RELEVANT(Localization.lang("Toggle relevance"), IconTheme.JabRefIcons.RELEVANCE),
     NEW_LIBRARY(Localization.lang("New library"), IconTheme.JabRefIcons.NEW),
-    NEW_LIBRARY_BIBTEX(Localization.lang("New %0 library", BibDatabaseMode.BIBTEX.getFormattedName())),
-    NEW_LIBRARY_BIBLATEX(Localization.lang("New %0 library", BibDatabaseMode.BIBLATEX.getFormattedName())),
+    NEW_LIBRARY_BIBTEX(Localization.lang("New %0 library", BibDatabaseMode.BIBTEX.getFormattedName()), IconTheme.JabRefIcons.NEW),
+    NEW_LIBRARY_BIBLATEX(Localization.lang("New %0 library", BibDatabaseMode.BIBLATEX.getFormattedName()), IconTheme.JabRefIcons.NEW),
     OPEN_LIBRARY(Localization.lang("Open library"), IconTheme.JabRefIcons.OPEN, KeyBinding.OPEN_DATABASE),
     IMPORT(Localization.lang("Import"), IconTheme.JabRefIcons.IMPORT),
     EXPORT(Localization.lang("Export"), IconTheme.JabRefIcons.EXPORT, KeyBinding.EXPORT),
diff --git a/src/main/java/org/jabref/gui/icon/IconTheme.java b/src/main/java/org/jabref/gui/icon/IconTheme.java
index 49cfe8ba53a..55341a664d0 100644
--- a/src/main/java/org/jabref/gui/icon/IconTheme.java
+++ b/src/main/java/org/jabref/gui/icon/IconTheme.java
@@ -197,7 +197,7 @@ public enum JabRefIcons implements JabRefIcon {
         CLOSE(MaterialDesignIcon.CLOSE_CIRCLE),
         PASTE(JabRefMaterialDesignIcon.PASTE),
         CUT(MaterialDesignIcon.CONTENT_CUT),
-        COPY(JabRefMaterialDesignIcon.COPY),
+        COPY(MaterialDesignIcon.CONTENT_COPY),
         COMMENT(MaterialDesignIcon.COMMENT),
         REDO(MaterialDesignIcon.REDO),
         UNDO(MaterialDesignIcon.UNDO),
@@ -239,7 +239,7 @@ public enum JabRefIcons implements JabRefIcon {
         AUTO_FILE_LINK(MaterialDesignIcon.FILE_FIND) /*css: file-find */,
         QUALITY_ASSURED(MaterialDesignIcon.CERTIFICATE), /*css: certificate */
         QUALITY(MaterialDesignIcon.CERTIFICATE),/*css: certificate */
-        OPEN(MaterialDesignIcon.FOLDER_OUTLINE) /*css: folder-outline */,
+        OPEN(MaterialDesignIcon.FOLDER_OUTLINE) /*css: folder */,
         ADD_ROW(MaterialDesignIcon.SERVER_PLUS) /* css: server-plus*/,
         REMOVE_ROW(MaterialDesignIcon.SERVER_MINUS) /*css: server-minus */,
         PICTURE(MaterialDesignIcon.FILE_IMAGE) /*css: file-image */,