diff --git a/src/main/java/com/avispa/ecm/model/configuration/propertypage/content/PropertyPageContent.java b/src/main/java/com/avispa/ecm/model/configuration/propertypage/content/PropertyPageContent.java
index 8071221..df49ba9 100644
--- a/src/main/java/com/avispa/ecm/model/configuration/propertypage/content/PropertyPageContent.java
+++ b/src/main/java/com/avispa/ecm/model/configuration/propertypage/content/PropertyPageContent.java
@@ -19,6 +19,7 @@
 package com.avispa.ecm.model.configuration.propertypage.content;
 
 import com.avispa.ecm.model.configuration.propertypage.content.control.Control;
+import com.avispa.ecm.model.configuration.propertypage.content.control.Hidden;
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import lombok.Getter;
 import lombok.Setter;
@@ -37,4 +38,23 @@ public class PropertyPageContent {
     private PropertyPageContext context;
     private String size = "normal";
     private List<Control> controls;
+
+    /**
+     * Adds hidden control on the root level of control hierarchy (can't be nested in lists, tables or even columns).
+     * It can be called only after successful mapping of property page configuration.
+     *
+     * @param property property name
+     * @param value    value
+     */
+    public void addHiddenControl(String property, Object value) {
+        if (controls == null) {
+            throw new IllegalStateException("Map property page configuration to this object first");
+        }
+
+        Hidden hidden = new Hidden();
+        hidden.setProperty(property);
+        hidden.setValue(value);
+
+        controls.add(hidden);
+    }
 }
diff --git a/src/main/java/com/avispa/ecm/model/configuration/propertypage/content/control/Table.java b/src/main/java/com/avispa/ecm/model/configuration/propertypage/content/control/Table.java
index f144752..ab3942d 100644
--- a/src/main/java/com/avispa/ecm/model/configuration/propertypage/content/control/Table.java
+++ b/src/main/java/com/avispa/ecm/model/configuration/propertypage/content/control/Table.java
@@ -31,6 +31,7 @@
 public class Table extends PropertyControl {
     private List<PropertyControl> controls;
 
+    private boolean fixed;
     private int size;
 
     public Table() {
diff --git a/src/main/resources/json-schemas/control/table.json b/src/main/resources/json-schemas/control/table.json
index 1c2798a..02d1f78 100644
--- a/src/main/resources/json-schemas/control/table.json
+++ b/src/main/resources/json-schemas/control/table.json
@@ -15,6 +15,9 @@
     "readonly": {
       "type": "boolean"
     },
+    "fixed": {
+      "type": "boolean"
+    },
     "property": {
       "type": "string",
       "pattern": "^[a-zA-Z](?:[a-zA-Z\\d.]*[a-zA-Z\\d])?+$"
diff --git a/src/test/java/com/avispa/ecm/model/configuration/propertypage/content/PropertyPageContentTest.java b/src/test/java/com/avispa/ecm/model/configuration/propertypage/content/PropertyPageContentTest.java
new file mode 100644
index 0000000..3054f5a
--- /dev/null
+++ b/src/test/java/com/avispa/ecm/model/configuration/propertypage/content/PropertyPageContentTest.java
@@ -0,0 +1,49 @@
+/*
+ * Avispa ECM - a small framework for implementing basic ECM solution
+ * Copyright (C) 2024 Rafał Hiszpański
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.avispa.ecm.model.configuration.propertypage.content;
+
+import com.avispa.ecm.model.configuration.propertypage.content.control.Hidden;
+import org.junit.jupiter.api.Test;
+
+import java.util.ArrayList;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertInstanceOf;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+/**
+ * @author Rafał Hiszpański
+ */
+class PropertyPageContentTest {
+    @Test
+    void givenEmptyPropertyPageContent_whenAddHidden_thenThrowException() {
+        var content = new PropertyPageContent();
+        assertThrows(IllegalStateException.class, () -> content.addHiddenControl("test", "test"));
+    }
+
+    @Test
+    void givenCorrectPropertyPageContent_whenAddHidden_thenNewControlAppears() {
+        var content = new PropertyPageContent();
+        content.setControls(new ArrayList<>());
+        content.addHiddenControl("test", "test");
+
+        assertFalse(content.getControls().isEmpty());
+        assertInstanceOf(Hidden.class, content.getControls().get(0));
+    }
+}
\ No newline at end of file