diff --git a/lib/include/cc_tools_qt/ToolsField.h b/lib/include/cc_tools_qt/ToolsField.h
index 45e11e5..8bad456 100644
--- a/lib/include/cc_tools_qt/ToolsField.h
+++ b/lib/include/cc_tools_qt/ToolsField.h
@@ -20,7 +20,9 @@
 
 #include "cc_tools_qt/Api.h"
 
+#include <QtCore/QMap>
 #include <QtCore/QString>
+#include <QtCore/QVariant>
 
 #include <cassert>
 #include <cstddef>
@@ -75,19 +77,29 @@ class CC_API ToolsField
     const Members& getMembers() const;
     void setMembers(Members&& members);    
 
+    void forceReadOnly();
+    bool isReadOnly() const;
+
+    void forceHiddenSerialization();
+    bool isHiddenSerialization() const;    
+
 protected:
     virtual const char* nameImpl() const = 0;
     virtual std::size_t lengthImpl() const = 0;
     virtual bool validImpl() const = 0;
+    virtual bool isReadOnlyImpl() const = 0;
+    virtual bool isHiddenSerializationImpl() const = 0;
     virtual SerialisedSeq getSerialisedValueImpl() const = 0;
     virtual bool setSerialisedValueImpl(const SerialisedSeq& value) = 0;
     virtual void dispatchImpl(ToolsFieldHandler& handler) = 0;
     virtual Ptr cloneImpl() = 0;
     virtual bool canWriteImpl() const = 0;
     virtual void resetImpl() = 0;
+    
 
 private:
     Members m_members;
+    QVariantMap m_props;
 };
 
 using ToolsFieldPtr = ToolsField::Ptr;
diff --git a/lib/include/cc_tools_qt/details/ToolsArrayListFieldImpl.h b/lib/include/cc_tools_qt/details/ToolsArrayListFieldImpl.h
index d2c7196..41235c5 100644
--- a/lib/include/cc_tools_qt/details/ToolsArrayListFieldImpl.h
+++ b/lib/include/cc_tools_qt/details/ToolsArrayListFieldImpl.h
@@ -49,6 +49,7 @@ class ToolsArrayListFieldImpl : public ToolsFieldBase<cc_tools_qt::field::ToolsA
     using Ptr = typename Base::Ptr;
     using ActPtr = typename Base::ActPtr;
     using PrefixFieldInfo = typename Base::PrefixFieldInfo;
+    using Members = typename Base::Members;
 
     using WrapFieldCallbackFunc = std::function<ToolsFieldPtr (ElementType&)>;
 
@@ -263,35 +264,8 @@ class ToolsArrayListFieldImpl : public ToolsFieldBase<cc_tools_qt::field::ToolsA
     void addFieldInternal(HasFeatureTag)
     {
         auto& col = Base::field().value();
-
-        auto& mems = Base::getMembers();
-
-        decltype(&col[0]) firstElemPtr = nullptr;
-        if (!col.empty()) {
-            firstElemPtr = &col[0];
-        }
-
         col.push_back(ElementType());
-        if (!m_wrapFieldFunc) {
-            [[maybe_unused]] static constexpr bool Callback_is_not_set = false;
-            assert(Callback_is_not_set);       
-            mems.clear();
-            return;
-        }
-
-        if (firstElemPtr == &col[0]) {
-            mems.push_back(m_wrapFieldFunc(col.back()));
-            assert(col.size() == mems.size());
-            return;
-        }
-
-        mems.clear();
-        mems.reserve(col.size());
-        for (auto& f : col) {
-            mems.push_back(m_wrapFieldFunc(f));
-        }
-
-        assert(col.size() == mems.size());
+        refreshMembersInternal(HasFeatureTag());
     }   
 
     void addFieldInternal(NoFeatureTag)
@@ -308,12 +282,7 @@ class ToolsArrayListFieldImpl : public ToolsFieldBase<cc_tools_qt::field::ToolsA
         }
 
         storage.erase(storage.begin() + idx);
-        auto& mems = Base::getMembers();
-        mems.clear();
-        mems.reserve(storage.size());
-        for (auto& f : storage) {
-            mems.push_back(m_wrapFieldFunc(f));
-        }
+        refreshMembersInternal(HasFeatureTag());
     }
 
     void removeFieldInternal([[maybe_unused]] int idx, NoFeatureTag)
@@ -330,8 +299,7 @@ class ToolsArrayListFieldImpl : public ToolsFieldBase<cc_tools_qt::field::ToolsA
         }
 
         auto& storage = Base::field().value();
-        auto& mems = Base::getMembers();
-        mems.clear();
+        Members mems;
         mems.reserve(storage.size());
         for (auto& f : storage) {
             mems.push_back(m_wrapFieldFunc(f));
@@ -340,6 +308,8 @@ class ToolsArrayListFieldImpl : public ToolsFieldBase<cc_tools_qt::field::ToolsA
                 assert(mems.back()->canWrite());
             }
         }
+
+        Base::setMembers(std::move(mems));
     }    
 
     void refreshMembersInternal(NoFeatureTag)
diff --git a/lib/include/cc_tools_qt/details/ToolsFieldBase.h b/lib/include/cc_tools_qt/details/ToolsFieldBase.h
index 1ded357..48413fa 100644
--- a/lib/include/cc_tools_qt/details/ToolsFieldBase.h
+++ b/lib/include/cc_tools_qt/details/ToolsFieldBase.h
@@ -75,6 +75,16 @@ class ToolsFieldBase : public TBase
         return m_field.valid();
     }
 
+    virtual bool isReadOnlyImpl() const override
+    {
+        return Field::hasFixedValue();
+    }
+
+    virtual bool isHiddenSerializationImpl() const override
+    {
+        return Field::hasEmptySerialization();
+    }
+
     Field& field()
     {
         return m_field;
diff --git a/lib/src/ToolsField.cpp b/lib/src/ToolsField.cpp
index 425a30b..44504a1 100644
--- a/lib/src/ToolsField.cpp
+++ b/lib/src/ToolsField.cpp
@@ -19,10 +19,30 @@
 #include "cc_tools_qt/ToolsField.h"
 
 #include <cassert>
+#include <vector>
+#include <utility>
 
 namespace cc_tools_qt
 {
 
+namespace 
+{
+
+const QString& readOnlyProp()
+{
+    static const QString Str("cc.read_only");
+    return Str;
+}
+
+const QString& hiddenSerializationProp()
+{
+    static const QString Str("cc.hidden_ser");
+    return Str;
+}
+
+} // namespace 
+    
+
 ToolsField::ToolsField() = default;
 
 ToolsField::~ToolsField() noexcept = default;
@@ -104,6 +124,7 @@ ToolsField::Ptr ToolsField::clone()
     }
     auto ptr = cloneImpl();
     ptr->setMembers(std::move(clonedMembers));
+    ptr->m_props = m_props;
     return ptr;
 }
 
@@ -130,6 +151,56 @@ const ToolsField::Members& ToolsField::getMembers() const
 void ToolsField::setMembers(Members&& members)
 {
     m_members = std::move(members);
+    for (auto& m : m_members) {
+        using CheckFunc = bool (ToolsField::*)() const;
+        using ForceFunc = void (ToolsField::*)();
+        static const std::vector<std::pair<CheckFunc, ForceFunc>> List = {
+            {&ToolsField::isReadOnly, &ToolsField::forceReadOnly},
+        };
+
+        assert(m);
+        for (auto& funcs : List) {
+            if ((m.get()->*funcs.first)()) {
+                (m.get()->*funcs.second)();
+            }
+        }
+    }
+}
+
+void ToolsField::forceReadOnly()
+{
+    m_props[readOnlyProp()] = true;
+    for (auto& m : m_members) {
+        assert(m);
+        m->forceReadOnly();
+    }
+}
+
+bool ToolsField::isReadOnly() const
+{
+    if (m_props.contains(readOnlyProp())) {
+        return true;
+    }
+
+    return isReadOnlyImpl();
+}
+
+void ToolsField::forceHiddenSerialization()
+{
+    m_props[hiddenSerializationProp()] = true;
+    for (auto& m : m_members) {
+        assert(m);
+        m->forceHiddenSerialization();
+    }
+}
+
+bool ToolsField::isHiddenSerialization() const
+{
+    if (m_props.contains(hiddenSerializationProp())) {
+        return true;
+    }
+
+    return isHiddenSerializationImpl();
 }
 
 }  // namespace cc_tools_qt