diff --git a/timeseriesviewer/ui/docks.py b/timeseriesviewer/ui/docks.py
index edf74cd3894eda1c7ee316ab910e2895ce61a5e8..83daa54d0c8e2ecdaa6e097b4acf06e7ae3a4d2a 100644
--- a/timeseriesviewer/ui/docks.py
+++ b/timeseriesviewer/ui/docks.py
@@ -103,10 +103,11 @@ class NavigationDockUI(TsvDockWidgetBase, load('navigationdock.ui')):
     def __init__(self, parent=None):
         super(NavigationDockUI, self).__init__(parent)
         self.setupUi(self)
-        self.mCrs = None
 
         #default: disable QgsSync box
         self.gbSyncQgs.setEnabled(False)
+        self.btnCrs.crsChanged.connect(self.sigCrsChanged.emit)
+        self.btnCrs.crsChanged.connect(self.onCrsUpdated)
 
         self.cbSyncQgsMapExtent.clicked.connect(self.qgsSyncStateChanged)
         self.cbSyncQgsMapCenter.clicked.connect(self.qgsSyncStateChanged)
@@ -146,14 +147,16 @@ class NavigationDockUI(TsvDockWidgetBase, load('navigationdock.ui')):
     sigCrsChanged = pyqtSignal(QgsCoordinateReferenceSystem)
     def setCrs(self, crs):
         assert isinstance(crs, QgsCoordinateReferenceSystem)
-        old = self.mCrs
-        self.mCrs = crs
-        self.textBoxCRSInfo.setPlainText(crs.toWkt())
-        if self.mCrs != old:
-            self.sigCrsChanged.emit(crs)
+        self.btnCrs.setCrs(crs)
+        self.btnCrs.setLayerCrs(crs)
+        self.onCrsUpdated(crs)
 
     def crs(self):
-        return self.mCrs
+        return self.btnCrs.crs()
+
+    def onCrsUpdated(self, crs):
+        self.gbCrs.setTitle(crs.authid())
+        self.textBoxCRSInfo.setPlainText(crs.toWkt())
 
     sigSpatialExtentChanged = pyqtSignal(SpatialExtent)
 
diff --git a/timeseriesviewer/ui/navigationdock.ui b/timeseriesviewer/ui/navigationdock.ui
index 594a8284d58fea651052713f1be603bb03edf88e..4741405380ae1493404c0cc3d8715eccb32a5b5b 100644
--- a/timeseriesviewer/ui/navigationdock.ui
+++ b/timeseriesviewer/ui/navigationdock.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>237</width>
-    <height>217</height>
+    <width>397</width>
+    <height>309</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -291,103 +291,113 @@
          </layout>
         </widget>
        </item>
-       <item row="3" column="0">
-        <widget class="QToolButton" name="btnCRS">
-         <property name="text">
-          <string>...</string>
-         </property>
-         <property name="icon">
-          <iconset resource="resources.qrc">
-           <normaloff>:/timeseriesviewer/icons/CRS.png</normaloff>:/timeseriesviewer/icons/CRS.png</iconset>
-         </property>
-        </widget>
-       </item>
        <item row="3" column="1">
-        <widget class="QPlainTextEdit" name="textBoxCRSInfo">
-         <property name="enabled">
-          <bool>true</bool>
-         </property>
-         <property name="sizePolicy">
-          <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
-           <horstretch>0</horstretch>
-           <verstretch>0</verstretch>
-          </sizepolicy>
-         </property>
-         <property name="minimumSize">
-          <size>
-           <width>0</width>
-           <height>50</height>
-          </size>
-         </property>
-         <property name="maximumSize">
-          <size>
-           <width>16777215</width>
-           <height>50</height>
-          </size>
-         </property>
-         <property name="frameShape">
-          <enum>QFrame::StyledPanel</enum>
-         </property>
-         <property name="frameShadow">
-          <enum>QFrame::Plain</enum>
-         </property>
-         <property name="readOnly">
-          <bool>true</bool>
-         </property>
-        </widget>
-       </item>
-       <item row="4" column="0" colspan="2">
-        <widget class="QGroupBox" name="gbSyncQgs">
-         <property name="minimumSize">
-          <size>
-           <width>0</width>
-           <height>50</height>
-          </size>
-         </property>
+        <widget class="QgsCollapsibleGroupBox" name="gbCrs">
          <property name="title">
-          <string>Sync with QGIS on...</string>
+          <string>&lt;Coordinate Reference System&gt;</string>
          </property>
-         <property name="flat">
-          <bool>false</bool>
+         <property name="collapsed">
+          <bool>true</bool>
          </property>
-         <layout class="QHBoxLayout" name="horizontalLayout_3">
-          <item>
-           <widget class="QCheckBox" name="cbSyncQgsMapCenter">
-            <property name="text">
-             <string>center</string>
-            </property>
-           </widget>
-          </item>
+         <layout class="QVBoxLayout" name="verticalLayout_2">
+          <property name="spacing">
+           <number>0</number>
+          </property>
+          <property name="margin">
+           <number>6</number>
+          </property>
           <item>
-           <widget class="QCheckBox" name="cbSyncQgsMapExtent">
-            <property name="text">
-             <string>exent</string>
+           <widget class="QPlainTextEdit" name="textBoxCRSInfo">
+            <property name="enabled">
+             <bool>true</bool>
             </property>
-           </widget>
-          </item>
-          <item>
-           <widget class="QCheckBox" name="cbSyncQgsCRS">
-            <property name="text">
-             <string>CRS</string>
+            <property name="sizePolicy">
+             <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
+              <horstretch>0</horstretch>
+              <verstretch>0</verstretch>
+             </sizepolicy>
             </property>
-           </widget>
-          </item>
-          <item>
-           <spacer name="horizontalSpacer">
-            <property name="orientation">
-             <enum>Qt::Horizontal</enum>
+            <property name="minimumSize">
+             <size>
+              <width>0</width>
+              <height>100</height>
+             </size>
             </property>
-            <property name="sizeHint" stdset="0">
+            <property name="maximumSize">
              <size>
-              <width>40</width>
-              <height>20</height>
+              <width>16777215</width>
+              <height>16777215</height>
              </size>
             </property>
-           </spacer>
+            <property name="frameShape">
+             <enum>QFrame::StyledPanel</enum>
+            </property>
+            <property name="frameShadow">
+             <enum>QFrame::Plain</enum>
+            </property>
+            <property name="readOnly">
+             <bool>true</bool>
+            </property>
+           </widget>
           </item>
          </layout>
         </widget>
        </item>
+       <item row="3" column="0">
+        <widget class="QgsProjectionSelectionWidget" name="btnCrs"/>
+       </item>
+      </layout>
+     </widget>
+    </item>
+    <item>
+     <widget class="QGroupBox" name="gbSyncQgs">
+      <property name="minimumSize">
+       <size>
+        <width>0</width>
+        <height>50</height>
+       </size>
+      </property>
+      <property name="title">
+       <string>Sync with QGIS on...</string>
+      </property>
+      <property name="flat">
+       <bool>false</bool>
+      </property>
+      <layout class="QHBoxLayout" name="horizontalLayout_3">
+       <item>
+        <widget class="QCheckBox" name="cbSyncQgsMapCenter">
+         <property name="text">
+          <string>center</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QCheckBox" name="cbSyncQgsMapExtent">
+         <property name="text">
+          <string>exent</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QCheckBox" name="cbSyncQgsCRS">
+         <property name="text">
+          <string>CRS</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <spacer name="horizontalSpacer">
+         <property name="orientation">
+          <enum>Qt::Horizontal</enum>
+         </property>
+         <property name="sizeHint" stdset="0">
+          <size>
+           <width>40</width>
+           <height>20</height>
+          </size>
+         </property>
+        </spacer>
+       </item>
       </layout>
      </widget>
     </item>
@@ -455,6 +465,20 @@
    </property>
   </action>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>QgsCollapsibleGroupBox</class>
+   <extends>QGroupBox</extends>
+   <header>qgscollapsiblegroupbox.h</header>
+   <container>1</container>
+  </customwidget>
+  <customwidget>
+   <class>QgsProjectionSelectionWidget</class>
+   <extends>QWidget</extends>
+   <header>qgsprojectionselectionwidget.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
  <resources>
   <include location="resources.qrc"/>
  </resources>