diff --git a/CHANGELOG.md b/CHANGELOG.md
index 67d7bb8..212fd26 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.4.0] - 2022-11-04
+
+### Added
+- added class org.adwmainz.da.extensions.askmore.operations.FullySelectElementsOperation.java
+
 ## [1.3.0] - 2020-07-30
 
 ### Added
diff --git a/README.md b/README.md
index 9607f79..0eab8c3 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ This software package provides eight Java operations developed at the Digital Ac
 
 
 # Requirements
-The AskMoreXtension was developed and tested to be used with the versions 19.1 to 21.0 of the [Oxygen XML Editor](https://www.oxygenxml.com/).
+The AskMoreXtension was developed and tested to be used with the versions 19.1 to 24.0 of the [Oxygen XML Editor](https://www.oxygenxml.com/).
 
 
 # Download and Installation
diff --git a/src/main/java/org/adwmainz/da/extensions/askmore/operations/FullySelectElementsOperation.java b/src/main/java/org/adwmainz/da/extensions/askmore/operations/FullySelectElementsOperation.java
new file mode 100644
index 0000000..f8b8490
--- /dev/null
+++ b/src/main/java/org/adwmainz/da/extensions/askmore/operations/FullySelectElementsOperation.java
@@ -0,0 +1,77 @@
+package org.adwmainz.da.extensions.askmore.operations;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.adwmainz.da.extensions.askmore.utils.APIAccessUtils;
+import org.adwmainz.da.extensions.askmore.utils.ArgumentParser;
+import org.adwmainz.da.extensions.askmore.utils.AskMoreArgumentProvider;
+
+import ro.sync.ecss.extensions.api.ArgumentDescriptor;
+import ro.sync.ecss.extensions.api.ArgumentsMap;
+import ro.sync.ecss.extensions.api.AuthorAccess;
+import ro.sync.ecss.extensions.api.AuthorDocumentController;
+import ro.sync.ecss.extensions.api.AuthorOperation;
+import ro.sync.ecss.extensions.api.AuthorOperationException;
+import ro.sync.ecss.extensions.api.AuthorSelectionModel;
+import ro.sync.ecss.extensions.api.ContentInterval;
+import ro.sync.ecss.extensions.api.access.AuthorEditorAccess;
+import ro.sync.ecss.extensions.api.node.AuthorNode;
+
+public class FullySelectElementsOperation implements AuthorOperation {
+
+	// field
+	protected ArgumentDescriptor[] arguments;
+
+	// constructor
+	public FullySelectElementsOperation() {
+		arguments = new ArgumentDescriptor[] {
+			new ArgumentDescriptor(
+					AskMoreArgumentProvider.ARGUMENT_LOCATION_RESTRICTION,
+					ArgumentDescriptor.TYPE_XPATH_EXPRESSION,
+					"An XPath expression that specifies which nodes from the current selection should be used."
+							+ "\n(i.e. this operation selects all (partially) selected nodes with the name NAME and an attribute ATTR if the value "
+							+ "of this param is set to //NAME[@ATTR]."
+			)
+		};
+	}
+
+	@Override
+	public String getDescription() {
+		return "Fully selects nodes matching a given XPath expression that are only partly selected in the Author Mode.";
+	}
+
+	@Override
+	public void doOperation(AuthorAccess authorAccess, ArgumentsMap args)
+			throws IllegalArgumentException, AuthorOperationException {
+		String location = ArgumentParser.getValidString(args, AskMoreArgumentProvider.ARGUMENT_LOCATION_RESTRICTION);
+		
+		// get the document controller and editor access
+		AuthorDocumentController documentController = authorAccess.getDocumentController();
+		AuthorEditorAccess editorAccess = authorAccess.getEditorAccess();
+		
+		// get all possible insert locations
+		AuthorNode[] targetNodes = documentController.findNodesByXPath(location, false/*include text nodes*/, true, true);
+		
+		// get all selection intervals
+		AuthorSelectionModel selectionModel = editorAccess.getAuthorSelectionModel();
+		List<ContentInterval> selectionIntervals = selectionModel.getSelectionIntervals();
+		List<ContentInterval> intervals = new ArrayList<>();
+		
+		// iterate over nodes to find the selected ones
+		for (AuthorNode targetNode: targetNodes) {
+			for (ContentInterval selectionInterval: selectionIntervals) {
+				if (APIAccessUtils.containsNode(selectionInterval, targetNode)) {
+					intervals.add(new ContentInterval(targetNode.getStartOffset(), targetNode.getEndOffset()));
+				}
+			}
+		}
+		selectionModel.setSelectionIntervals(intervals, true);
+	}
+
+	@Override
+	public ArgumentDescriptor[] getArguments() {
+		return arguments;
+	}
+
+}
diff --git a/src/main/java/org/adwmainz/da/extensions/askmore/utils/AskMoreArgumentProvider.java b/src/main/java/org/adwmainz/da/extensions/askmore/utils/AskMoreArgumentProvider.java
index 93691f5..082f0f7 100644
--- a/src/main/java/org/adwmainz/da/extensions/askmore/utils/AskMoreArgumentProvider.java
+++ b/src/main/java/org/adwmainz/da/extensions/askmore/utils/AskMoreArgumentProvider.java
@@ -25,6 +25,7 @@ public class AskMoreArgumentProvider {
 	public static final String ARGUMENT_INSERT_LOCATION = "insertLocation";
 	public static final String ARGUMENT_INSERT_LOCATION_RESTRICTION = "insertLocationRestriction";
 	public static final String ARGUMENT_INSERT_POSITION = "insertPosition";
+	public static final String ARGUMENT_LOCATION_RESTRICTION = "locationRestriction";
 	public static final String ARGUMENT_MESSAGE = "message";
 	public static final String ARGUMENT_NO_RESULT_MESSAGE = "noResultMessage";
 	public static final String ARGUMENT_NOTIFY_USER = "notifyUser";