diff --git a/src/plugins/qmldesigner/components/designsystemview/collectionmodel.cpp b/src/plugins/qmldesigner/components/designsystemview/collectionmodel.cpp
index b4e65299cb1..df2908836c4 100644
--- a/src/plugins/qmldesigner/components/designsystemview/collectionmodel.cpp
+++ b/src/plugins/qmldesigner/components/designsystemview/collectionmodel.cpp
@@ -83,15 +83,132 @@ QHash<int, QByteArray> CollectionModel::roleNames() const
     return roles;
 }
 
+bool CollectionModel::insertColumns([[maybe_unused]] int column, int count, const QModelIndex &parent)
+{
+    // Append column only
+    if (parent.isValid() || count < 0)
+        return false;
+
+    bool addSuccess = false;
+    while (count--)
+        addSuccess |= m_collection->addTheme(QByteArrayLiteral("theme")).has_value();
+
+    if (addSuccess) {
+        beginResetModel();
+        updateCache();
+        endResetModel();
+    }
+    return true;
+}
+
+bool CollectionModel::removeColumns(int column, int count, const QModelIndex &parent)
+{
+    const auto sentinelIndex = column + count;
+    if (parent.isValid() || column < 0 || count < 1 || sentinelIndex > columnCount(parent))
+        return false;
+
+    beginResetModel();
+    while (column < sentinelIndex)
+        m_collection->removeTheme(m_themeIdList[column++]);
+
+    updateCache();
+    endResetModel();
+    return true;
+}
+
+bool CollectionModel::removeRows(int row, int count, const QModelIndex &parent)
+{
+    const auto sentinelIndex = row + count;
+    if (parent.isValid() || row < 0 || count < 1 || sentinelIndex > rowCount(parent))
+        return false;
+
+    beginResetModel();
+    while (row < sentinelIndex) {
+        auto [groupType, name] = m_propertyInfoList[row++];
+        m_collection->removeProperty(groupType, name);
+    }
+    updateCache();
+    endResetModel();
+    return true;
+}
+
 void CollectionModel::updateCache()
 {
-    m_themeIdList = m_collection->allThemeIds();
-
+    m_themeIdList.clear();
     m_propertyInfoList.clear();
-    m_collection->forAllGroups([this](GroupType gt, DSThemeGroup *themeGroup) {
-        for (auto propName : themeGroup->propertyNames())
-            m_propertyInfoList.push_back({gt, propName});
-    });
+
+    if (m_collection) {
+        m_themeIdList = m_collection->allThemeIds();
+
+        m_collection->forAllGroups([this](GroupType gt, DSThemeGroup *themeGroup) {
+            for (auto propName : themeGroup->propertyNames())
+                m_propertyInfoList.push_back({gt, propName});
+        });
+    }
+}
+
+void CollectionModel::addProperty(GroupType group, const QString &name, const QVariant &value, bool isBinding)
+{
+    if (m_collection->addProperty(group, {name.toUtf8(), value, isBinding})) {
+        beginResetModel();
+        updateCache();
+        endResetModel();
+    }
+}
+
+bool CollectionModel::setData(const QModelIndex &index, const QVariant &value, int role)
+{
+    switch (role) {
+    case Qt::EditRole: {
+        ThemeProperty p = value.value<ThemeProperty>();
+        const auto [groupType, propName] = m_propertyInfoList[index.row()];
+        p.name = propName;
+        const ThemeId id = m_themeIdList[index.column()];
+        if (m_collection->updateProperty(id, groupType, p)) {
+            beginResetModel();
+            updateCache();
+            endResetModel();
+        }
+    }
+    default:
+        break;
+    }
+    return false;
+}
+
+bool CollectionModel::setHeaderData(int section,
+                                    Qt::Orientation orientation,
+                                    const QVariant &value,
+                                    int role)
+{
+    if (role != Qt::EditRole)
+        return false;
+
+    if (section < 0 || (orientation == Qt::Horizontal && section >= columnCount())
+        || (orientation == Qt::Vertical && section >= rowCount())) {
+        return false; // Out of bounds
+    }
+
+    const auto &newName = value.toString().toUtf8();
+    bool success = false;
+    if (orientation == Qt::Horizontal) {
+        // Theme
+        success = m_collection->renameTheme(findThemeId(section), newName);
+    } else {
+        // Property Name
+        if (auto propInfo = findPropertyName(section)) {
+            auto [groupType, propName] = *propInfo;
+            success = m_collection->renameProperty(groupType, propName, newName);
+        }
+    }
+
+    if (success) {
+        beginResetModel();
+        updateCache();
+        endResetModel();
+    }
+
+    return success;
 }
 
 ThemeId CollectionModel::findThemeId(int column) const
diff --git a/src/plugins/qmldesigner/components/designsystemview/collectionmodel.h b/src/plugins/qmldesigner/components/designsystemview/collectionmodel.h
index 2253b7e637a..1eda71702d6 100644
--- a/src/plugins/qmldesigner/components/designsystemview/collectionmodel.h
+++ b/src/plugins/qmldesigner/components/designsystemview/collectionmodel.h
@@ -14,11 +14,14 @@ using PropInfo = std::pair<GroupType, PropertyName>;
 
 class CollectionModel : public QAbstractItemModel
 {
-    enum class Roles { GroupRole = Qt::UserRole + 1, BindingRole };
+    Q_OBJECT
 
 public:
+    enum class Roles { GroupRole = Qt::UserRole + 1, BindingRole };
+
     CollectionModel(DSThemeManager *collection);
 
+    // QAbstractItemModel Interface
     int columnCount(const QModelIndex &parent = QModelIndex()) const override;
     QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
     QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
@@ -27,10 +30,26 @@ public:
     QVariant headerData(int section,
                         Qt::Orientation orientation,
                         int role = Qt::DisplayRole) const override;
-
     QHash<int, QByteArray> roleNames() const override;
+    // Add Themes
+    bool insertColumns(int column, int count, const QModelIndex &parent = QModelIndex()) override;
+    // Remove Themes
+    bool removeColumns(int column, int count, const QModelIndex &parent = QModelIndex()) override;
+    // Remove Properties
+    bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex()) override;
 
     void updateCache();
+    Q_INVOKABLE void addProperty(GroupType group,
+                                 const QString &name,
+                                 const QVariant &value,
+                                 bool isBinding);
+    // Edit property value
+    bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;
+    // Edit property name / Theme name
+    Q_INVOKABLE bool setHeaderData(int section,
+                                   Qt::Orientation orientation,
+                                   const QVariant &value,
+                                   int role = Qt::EditRole) override;
 
 private:
     ThemeId findThemeId(int column) const;
diff --git a/src/plugins/qmldesigner/components/designsystemview/designsysteminterface.cpp b/src/plugins/qmldesigner/components/designsystemview/designsysteminterface.cpp
index a62ab663c59..f708739ab50 100644
--- a/src/plugins/qmldesigner/components/designsystemview/designsysteminterface.cpp
+++ b/src/plugins/qmldesigner/components/designsystemview/designsysteminterface.cpp
@@ -5,6 +5,7 @@
 #include "collectionmodel.h"
 
 #include <designsystem/dsconstants.h>
+#include <designsystem/dsthememanager.h>
 #include <QQmlEngine>
 
 namespace QmlDesigner {
@@ -21,30 +22,64 @@ void DesignSystemInterface::loadDesignSystem()
 {
     m_models.clear();
     m_store->load();
-    emit loadFinished();
+    emit collectionsChanged();
 }
 
-QAbstractItemModel *DesignSystemInterface::model(const QString &typeName)
+CollectionModel *DesignSystemInterface::model(const QString &typeName)
 {
     if (auto collection = m_store->collection(typeName)) {
         auto itr = m_models.find(typeName);
         if (itr != m_models.end())
             return itr->second.get();
 
-        auto [newItr, success] = m_models.try_emplace(typeName,
-                                                      std::make_unique<CollectionModel>(*collection));
-        if (success) {
-            // Otherwise the model will be deleted by the QML engine.
-            QQmlEngine::setObjectOwnership(newItr->second.get(), QQmlEngine::CppOwnership);
-            return newItr->second.get();
-        }
+        return createModel(typeName, collection);
     }
 
     return nullptr;
 }
 
+void DesignSystemInterface::addCollection(const QString &name)
+{
+    if (auto collection = m_store->addCollection(name))
+        emit collectionsChanged();
+}
+
+void DesignSystemInterface::removeCollection(const QString &name)
+{
+    if (m_store->collection(name)) {
+        m_models.erase(name);
+        m_store->removeCollection(name);
+        emit collectionsChanged();
+    }
+}
+
+void DesignSystemInterface::renameCollection(const QString &oldName, const QString &newName)
+{
+    if (m_store->renameCollection(oldName, newName))
+        emit collectionsChanged();
+}
+
+ThemeProperty DesignSystemInterface::createThemeProperty(const QString &name,
+                                                         const QVariant &value,
+                                                         bool isBinding) const
+{
+    return {name.toUtf8(), value, isBinding};
+}
+
 QStringList DesignSystemInterface::collections() const
 {
     return m_store->collectionNames();
 }
+
+CollectionModel *DesignSystemInterface::createModel(const QString &typeName, DSThemeManager *collection)
+{
+    auto [newItr, success] = m_models.try_emplace(typeName,
+                                                  std::make_unique<CollectionModel>(collection));
+    if (success) {
+        // Otherwise the model will be deleted by the QML engine.
+        QQmlEngine::setObjectOwnership(newItr->second.get(), QQmlEngine::CppOwnership);
+        return newItr->second.get();
+    }
+    return nullptr;
+}
 } // namespace QmlDesigner
diff --git a/src/plugins/qmldesigner/components/designsystemview/designsysteminterface.h b/src/plugins/qmldesigner/components/designsystemview/designsysteminterface.h
index e4728e3f0bd..fd732fb88b6 100644
--- a/src/plugins/qmldesigner/components/designsystemview/designsysteminterface.h
+++ b/src/plugins/qmldesigner/components/designsystemview/designsysteminterface.h
@@ -10,22 +10,35 @@ class QAbstractItemModel;
 
 namespace QmlDesigner {
 class CollectionModel;
+class DSThemeManager;
+
 class DesignSystemInterface : public QObject
 {
     Q_OBJECT
-    Q_PROPERTY(QStringList collections READ collections NOTIFY loadFinished FINAL)
+    Q_PROPERTY(QStringList collections READ collections NOTIFY collectionsChanged FINAL)
 
 public:
     DesignSystemInterface(DSStore *store);
     ~DesignSystemInterface();
 
     Q_INVOKABLE void loadDesignSystem();
-    Q_INVOKABLE QAbstractItemModel *model(const QString &typeName);
+    Q_INVOKABLE CollectionModel *model(const QString &typeName);
+
+    Q_INVOKABLE void addCollection(const QString &name);
+    Q_INVOKABLE void removeCollection(const QString &name);
+    Q_INVOKABLE void renameCollection(const QString &oldName, const QString &newName);
+
+    Q_INVOKABLE ThemeProperty createThemeProperty(const QString &name,
+                                                  const QVariant &value,
+                                                  bool isBinding = false) const;
 
     QStringList collections() const;
 
 signals:
-    void loadFinished();
+    void collectionsChanged();
+
+private:
+    CollectionModel *createModel(const QString &typeName, DSThemeManager *collection);
 
 private:
     class DSStore *m_store = nullptr;
diff --git a/src/plugins/qmldesigner/libs/designsystem/dsstore.cpp b/src/plugins/qmldesigner/libs/designsystem/dsstore.cpp
index aefba422464..ffa4050c9d5 100644
--- a/src/plugins/qmldesigner/libs/designsystem/dsstore.cpp
+++ b/src/plugins/qmldesigner/libs/designsystem/dsstore.cpp
@@ -209,6 +209,30 @@ std::optional<QString> DSStore::typeName(DSThemeManager *collection) const
     return {};
 }
 
+bool DSStore::removeCollection(const QString &name)
+{
+    return m_collections.erase(name);
+}
+
+bool DSStore::renameCollection(const QString &oldName, const QString &newName)
+{
+    auto itr = m_collections.find(oldName);
+    if (itr == m_collections.end() || oldName == newName)
+        return false;
+
+    const QString uniqueTypeName = uniqueCollectionName(newName);
+
+    // newName is mutated to make it unique or compatible. Bail.
+    // Case update is tolerated.
+    if (uniqueTypeName.toLower() != newName.toLower())
+        return false;
+
+    auto handle = m_collections.extract(oldName);
+    handle.key() = uniqueTypeName;
+    m_collections.insert(std::move(handle));
+    return true;
+}
+
 std::optional<Utils::FilePath> DSStore::moduleDirPath() const
 {
     return dsModuleDir(m_ed);
@@ -231,13 +255,13 @@ QString DSStore::uniqueCollectionName(const QString &hint) const
     });
 }
 
-std::optional<DSThemeManager *> DSStore::collection(const QString &typeName)
+DSThemeManager *DSStore::collection(const QString &typeName)
 {
     auto itr = m_collections.find(typeName);
     if (itr != m_collections.end())
         return &itr->second;
 
-    return {};
+    return nullptr;
 }
 
 std::optional<QString> DSStore::loadCollection(const QString &typeName,
diff --git a/src/plugins/qmldesigner/libs/designsystem/dsstore.h b/src/plugins/qmldesigner/libs/designsystem/dsstore.h
index fd37d13359b..8c0cc9c2d7f 100644
--- a/src/plugins/qmldesigner/libs/designsystem/dsstore.h
+++ b/src/plugins/qmldesigner/libs/designsystem/dsstore.h
@@ -33,8 +33,10 @@ public:
     size_t collectionCount() const { return m_collections.size(); }
 
     DSThemeManager *addCollection(const QString &qmlTypeName);
-    std::optional<DSThemeManager *> collection(const QString &typeName);
+    DSThemeManager *collection(const QString &typeName);
     std::optional<QString> typeName(DSThemeManager *collection) const;
+    bool removeCollection(const QString &name);
+    bool renameCollection(const QString &oldName, const QString &newName);
 
     std::optional<Utils::FilePath> moduleDirPath() const;
     QStringList collectionNames() const;
diff --git a/src/plugins/qmldesigner/libs/designsystem/dsthemegroup.cpp b/src/plugins/qmldesigner/libs/designsystem/dsthemegroup.cpp
index cc7eeda06fa..a49e21ae012 100644
--- a/src/plugins/qmldesigner/libs/designsystem/dsthemegroup.cpp
+++ b/src/plugins/qmldesigner/libs/designsystem/dsthemegroup.cpp
@@ -96,38 +96,29 @@ bool DSThemeGroup::hasProperty(const PropertyName &name) const
     return m_values.contains(name);
 }
 
-void DSThemeGroup::updateProperty(ThemeId theme, PropertyName newName, const ThemeProperty &prop)
+bool DSThemeGroup::updateProperty(ThemeId theme, const ThemeProperty &prop)
 {
     if (!m_values.contains(prop.name)) {
         qCDebug(dsLog) << "Property update failure. Can't find property" << prop;
-        return;
+        return false;
     }
 
-    if (!ThemeProperty{newName, prop.value, prop.isBinding}.isValid()) {
-        qCDebug(dsLog) << "Property update failure. Invalid property" << prop << newName;
-        return;
-    }
-
-    if (newName != prop.name && m_values.contains(newName)) {
-        qCDebug(dsLog) << "Property update failure. Property name update already exists" << newName
-                       << prop;
-        return;
+    if (!prop.isValid()) {
+        qCDebug(dsLog) << "Property update failure. Invalid property" << prop;
+        return false;
     }
 
     auto &tValues = m_values.at(prop.name);
     const auto itr = tValues.find(theme);
     if (itr == tValues.end()) {
         qCDebug(dsLog) << "Property update failure. No property for the theme" << theme << prop;
-        return;
+        return false;
     }
 
     auto &entry = tValues.at(theme);
     entry.value = prop.value;
     entry.isBinding = prop.isBinding;
-    if (newName != prop.name) {
-        m_values[newName] = std::move(tValues);
-        m_values.erase(prop.name);
-    }
+    return true;
 }
 
 void DSThemeGroup::removeProperty(const PropertyName &name)
@@ -135,6 +126,25 @@ void DSThemeGroup::removeProperty(const PropertyName &name)
     m_values.erase(name);
 }
 
+bool DSThemeGroup::renameProperty(const PropertyName &name, const PropertyName &newName)
+{
+    auto itr = m_values.find(name);
+    if (itr == m_values.end()) {
+        qCDebug(dsLog) << "Renaming non-existing property" << name;
+        return false;
+    }
+
+    if (m_values.contains(newName) || newName.trimmed().isEmpty()) {
+        qCDebug(dsLog) << "Renaming failed. Invalid new name" << name;
+        return false;
+    }
+
+    auto node = m_values.extract(itr);
+    node.key() = newName;
+    m_values.insert(std::move(node));
+    return true;
+}
+
 size_t DSThemeGroup::count(ThemeId theme) const
 {
     return std::accumulate(m_values.cbegin(),
diff --git a/src/plugins/qmldesigner/libs/designsystem/dsthemegroup.h b/src/plugins/qmldesigner/libs/designsystem/dsthemegroup.h
index b549cb74095..edb78fd66ba 100644
--- a/src/plugins/qmldesigner/libs/designsystem/dsthemegroup.h
+++ b/src/plugins/qmldesigner/libs/designsystem/dsthemegroup.h
@@ -38,8 +38,9 @@ public:
     std::optional<ThemeProperty> propertyValue(ThemeId theme, const PropertyName &name) const;
     bool hasProperty(const PropertyName &name) const;
 
-    void updateProperty(ThemeId theme, PropertyName newName, const ThemeProperty &prop);
+    bool updateProperty(ThemeId theme, const ThemeProperty &prop);
     void removeProperty(const PropertyName &name);
+    bool renameProperty(const PropertyName &name, const PropertyName &newName);
 
     size_t count(ThemeId theme) const;
     size_t count() const;
diff --git a/src/plugins/qmldesigner/libs/designsystem/dsthememanager.cpp b/src/plugins/qmldesigner/libs/designsystem/dsthememanager.cpp
index 5b980801bd5..b4faf0d5a4d 100644
--- a/src/plugins/qmldesigner/libs/designsystem/dsthememanager.cpp
+++ b/src/plugins/qmldesigner/libs/designsystem/dsthememanager.cpp
@@ -73,6 +73,24 @@ ThemeName DSThemeManager::themeName(ThemeId id) const
     return {};
 }
 
+bool DSThemeManager::renameTheme(ThemeId id, const ThemeName &newName)
+{
+    const ThemeName oldName = themeName(id);
+    if (oldName.isEmpty()) {
+        qCDebug(dsLog) << "Invalid theme rename. Theme does not exists. Id:" << id;
+        return false;
+    }
+
+    const ThemeName sanitizedName = uniqueThemeName(newName);
+    if (sanitizedName != newName) {
+        qCDebug(dsLog) << "Theme rename fail. New name " << newName << " is not valid:";
+        return false;
+    }
+
+    m_themes[id] = sanitizedName;
+    return true;
+}
+
 const std::vector<ThemeId> DSThemeManager::allThemeIds() const
 {
     std::vector<ThemeId> ids;
@@ -168,23 +186,29 @@ void DSThemeManager::removeProperty(GroupType gType, const PropertyName &name)
     dsGroup->removeProperty(name);
 }
 
-void DSThemeManager::updateProperty(ThemeId id, GroupType gType, const ThemeProperty &p)
-{
-    updateProperty(id, gType, p, p.name);
-}
-
-void DSThemeManager::updateProperty(ThemeId id,
-                                    GroupType gType,
-                                    const ThemeProperty &p,
-                                    const PropertyName &newName)
+bool DSThemeManager::updateProperty(ThemeId id, GroupType gType, const ThemeProperty &prop)
 {
     if (!m_themes.contains(id))
-        return;
+        return false;
 
     DSThemeGroup *dsGroup = propertyGroup(gType);
-    QTC_ASSERT(dsGroup, return);
+    QTC_ASSERT(dsGroup, return false);
 
-    dsGroup->updateProperty(id, newName, p);
+    return dsGroup->updateProperty(id, prop);
+}
+
+bool DSThemeManager::renameProperty(GroupType gType, const PropertyName &name, const PropertyName &newName)
+{
+    DSThemeGroup *dsGroup = propertyGroup(gType);
+    QTC_ASSERT(dsGroup, return false);
+
+    const auto generatedName = uniquePropertyName(newName);
+    if (generatedName != newName) {
+        qCDebug(dsLog) << "Can not rename property. Invalid property name";
+        return false;
+    }
+
+    return dsGroup->renameProperty(name, newName);
 }
 
 void DSThemeManager::decorate(ModelNode rootNode, const QByteArray &nodeType, bool isMCU) const
diff --git a/src/plugins/qmldesigner/libs/designsystem/dsthememanager.h b/src/plugins/qmldesigner/libs/designsystem/dsthememanager.h
index dc1396ae423..cf1de885c42 100644
--- a/src/plugins/qmldesigner/libs/designsystem/dsthememanager.h
+++ b/src/plugins/qmldesigner/libs/designsystem/dsthememanager.h
@@ -36,6 +36,7 @@ public:
     std::optional<ThemeId> addTheme(const ThemeName &themeNameHint);
     std::optional<ThemeId> themeId(const ThemeName &themeName) const;
     ThemeName themeName(ThemeId id) const;
+    bool renameTheme(ThemeId id, const ThemeName &newName);
     const std::vector<ThemeId> allThemeIds() const;
 
     void forAllGroups(std::function<void(GroupType, DSThemeGroup *)> callback) const;
@@ -51,8 +52,9 @@ public:
                                                GroupType gType,
                                                const PropertyName &name) const;
     void removeProperty(GroupType gType, const PropertyName &p);
-    void updateProperty(ThemeId id, GroupType gType, const ThemeProperty &p);
-    void updateProperty(ThemeId id, GroupType gType, const ThemeProperty &p, const PropertyName &newName);
+
+    bool updateProperty(ThemeId id, GroupType gType, const ThemeProperty &prop);
+    bool renameProperty(GroupType gType, const PropertyName &name, const PropertyName &newName);
 
     void decorate(ModelNode rootNode, const QByteArray &nodeType = "QtObject", bool isMCU = false) const;
     void decorateThemeInterface(ModelNode rootNode) const;
diff --git a/tests/unit/tests/unittests/designsystem/dsthememgr-test.cpp b/tests/unit/tests/unittests/designsystem/dsthememgr-test.cpp
index 4f04edd5bff..393af1c76d3 100644
--- a/tests/unit/tests/unittests/designsystem/dsthememgr-test.cpp
+++ b/tests/unit/tests/unittests/designsystem/dsthememgr-test.cpp
@@ -203,7 +203,7 @@ TEST_P(DesignSystemManagerTest, update_property_name)
     mgr.addProperty(groupType, testProp);
 
     // act
-    mgr.updateProperty(*themeId, groupType, testProp, testPropUpdated.name);
+    mgr.renameProperty(groupType, testPropNameFoo, testPropNameBar);
 
     // assert
     ASSERT_THAT(mgr,
@@ -220,7 +220,7 @@ TEST_P(DesignSystemManagerTest, updating_invalid_property_fails)
     mgr.addProperty(groupType, testProp);
 
     // act
-    mgr.updateProperty(*themeId, groupType, testProp, testPropUpdated.name);
+    mgr.updateProperty(*themeId, groupType, testPropUpdated);
 
     // assert
     ASSERT_THAT(mgr,