diff --git a/openmc_plotter/main_window.py b/openmc_plotter/main_window.py
index e4579a9..03555f9 100755
--- a/openmc_plotter/main_window.py
+++ b/openmc_plotter/main_window.py
@@ -190,8 +190,13 @@ def createMenuBar(self):
         self.openStatePointAction.setToolTip('Open statepoint file')
         self.openStatePointAction.triggered.connect(self.openStatePoint)
 
+        self.importPropertiesAction = QAction("&Import properties...", self)
+        self.importPropertiesAction.setToolTip("Import properties")
+        self.importPropertiesAction.triggered.connect(self.importProperties)
+
         self.dataMenu = self.mainMenu.addMenu('D&ata')
         self.dataMenu.addAction(self.openStatePointAction)
+        self.dataMenu.addAction(self.importPropertiesAction)
         self.updateDataMenu()
 
         # Edit Menu
@@ -531,6 +536,28 @@ def openStatePoint(self):
             self.updateDataMenu()
             self.tallyDock.update()
 
+    def importProperties(self):
+        filename, ext = QFileDialog.getOpenFileName(self, "Import properties",
+                                                    ".", "*.h5")
+        if not filename:
+            return
+
+        try:
+            openmc.lib.import_properties(filename)
+            message = 'Imported properties: {}'
+        except (FileNotFoundError, OSError, openmc.lib.exc.OpenMCError) as e:
+            message = 'Error opening properties file: {}'
+            msg_box = QMessageBox()
+            msg_box.setText(f"Error opening properties file: \n\n {e} \n")
+            msg_box.setIcon(QMessageBox.Warning)
+            msg_box.setStandardButtons(QMessageBox.Ok)
+            msg_box.exec_()
+        finally:
+            self.statusBar().showMessage(message.format(filename), 5000)
+
+        if self.model.activeView.colorby == 'temperature':
+            self.applyChanges()
+
     def closeStatePoint(self):
         # remove the statepoint object and update the data menu
         filename = self.model.statepoint.filename
diff --git a/openmc_plotter/plotgui.py b/openmc_plotter/plotgui.py
index d735880..c0dbc5e 100644
--- a/openmc_plotter/plotgui.py
+++ b/openmc_plotter/plotgui.py
@@ -183,11 +183,13 @@ def getIDinfo(self, event):
         # check that the position is in the axes view
         if 0 <= yPos < self.model.currentView.v_res \
            and 0 <= xPos and xPos < self.model.currentView.h_res:
-            id = self.model.ids[yPos][xPos]
-            temp = "{:g}".format(self.model.properties[yPos][xPos][0])
-            density = "{:g}".format(self.model.properties[yPos][xPos][1])
+            id = self.model.ids[yPos, xPos]
+            instance = self.model.instances[yPos, xPos]
+            temp = "{:g}".format(self.model.properties[yPos, xPos, 0])
+            density = "{:g}".format(self.model.properties[yPos, xPos, 1])
         else:
             id = _NOT_FOUND
+            instance = _NOT_FOUND
             density = str(_NOT_FOUND)
             temp = str(_NOT_FOUND)
 
@@ -207,7 +209,7 @@ def getIDinfo(self, event):
         properties = {'density': density,
                       'temperature': temp}
 
-        return id, properties, domain, domain_kind
+        return id, instance, properties, domain, domain_kind
 
     def mouseDoubleClickEvent(self, event):
         xCenter, yCenter = self.getPlotCoords(event.pos())
@@ -219,7 +221,7 @@ def mouseMoveEvent(self, event):
         xPlotPos, yPlotPos = self.getPlotCoords(event.pos())
 
         # Show Cell/Material ID, Name in status bar
-        id, properties, domain, domain_kind = self.getIDinfo(event)
+        id, instance, properties, domain, domain_kind = self.getIDinfo(event)
 
         domainInfo = ""
         tallyInfo = ""
@@ -235,21 +237,29 @@ def mouseMoveEvent(self, event):
             temperature = properties['temperature']
             density = properties['density']
 
+            if instance != _NOT_FOUND and domain_kind == 'Cell':
+                instanceInfo = f" ({instance})"
+            else:
+                instanceInfo = ""
             if id == _VOID_REGION:
                 domainInfo = ("VOID")
             elif id == _OVERLAP:
                 domainInfo = ("OVERLAP")
             elif id != _NOT_FOUND and domain[id].name:
-                domainInfo = ("{} {}: \"{}\"\t Density: {} g/cc\t"
-                              "Temperature: {} K".format(domain_kind,
-                                                         id,
-                                                         domain[id].name,
-                                                         density,
-                                                         temperature))
+                domainInfo = ("{} {}{}: \"{}\"\t Density: {} g/cc\t"
+                              "Temperature: {} K".format(
+                                  domain_kind,
+                                  id,
+                                  instanceInfo,
+                                  domain[id].name,
+                                  density,
+                                  temperature
+                             ))
             elif id != _NOT_FOUND:
-                domainInfo = ("{} {}\t Density: {} g/cc\t"
+                domainInfo = ("{} {}{}\t Density: {} g/cc\t"
                               "Temperature: {} K".format(domain_kind,
                                                          id,
+                                                         instanceInfo,
                                                          density,
                                                          temperature))
             else:
@@ -328,7 +338,7 @@ def contextMenuEvent(self, event):
         self.main_window.undoAction.setText('&Undo ({})'.format(len(self.model.previousViews)))
         self.main_window.redoAction.setText('&Redo ({})'.format(len(self.model.subsequentViews)))
 
-        id, properties, domain, domain_kind = self.getIDinfo(event)
+        id, instance, properties, domain, domain_kind = self.getIDinfo(event)
 
         cv = self.model.currentView
 
diff --git a/openmc_plotter/plotmodel.py b/openmc_plotter/plotmodel.py
index 11e2e19..f9f5cc7 100644
--- a/openmc_plotter/plotmodel.py
+++ b/openmc_plotter/plotmodel.py
@@ -100,6 +100,7 @@ def __init__(self):
 
         # Cell/Material ID by coordinates
         self.ids = None
+        self.instances = None
 
         self.version = __VERSION__
 
@@ -198,7 +199,8 @@ def makePlot(self):
         props = openmc.lib.property_map(cv)
 
         self.cell_ids = ids[:, :, 0]
-        self.mat_ids = ids[:, :, 1]
+        self.instances = ids[:, :, 1]
+        self.mat_ids = ids[:, :, 2]
 
         # set model ids based on domain
         if cv.colorby == 'cell':
diff --git a/setup.py b/setup.py
index 654c047..6e04f8d 100644
--- a/setup.py
+++ b/setup.py
@@ -35,9 +35,9 @@
     ],
 
     # Dependencies
-    'python_requires': '>=3.5',
+    'python_requires': '>=3.6',
     'install_requires': [
-        'openmc>0.12.0', 'numpy', 'matplotlib', 'PySide2'
+        'openmc>0.12.2', 'numpy', 'matplotlib', 'PySide2'
     ],
     'extras_require': {
         'test' : ['pytest', 'pytest-qt'],