diff --git a/src/main/java/com/erikmafo/btviewer/ui/projectexplorer/ProjectExplorerController.java b/src/main/java/com/erikmafo/btviewer/ui/projectexplorer/ProjectExplorerController.java
index 71bf489..7d0b0ce 100644
--- a/src/main/java/com/erikmafo/btviewer/ui/projectexplorer/ProjectExplorerController.java
+++ b/src/main/java/com/erikmafo/btviewer/ui/projectexplorer/ProjectExplorerController.java
@@ -10,6 +10,7 @@
 import javafx.beans.property.SimpleObjectProperty;
 import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
+import javafx.geometry.NodeOrientation;
 import javafx.scene.control.Button;
 import javafx.scene.control.ContentDisplay;
 import javafx.scene.control.ContextMenu;
@@ -24,9 +25,6 @@
 
 public class ProjectExplorerController {
 
-    @FXML
-    private Button addInstanceButton;
-
     @FXML
     private TreeView<TreeItemData> treeView;
 
@@ -91,7 +89,6 @@ protected void updateItem(@Nullable TreeItemData item, boolean empty) {
                     }
         });
         treeView.setVisible(true);
-        addInstanceButton.setOnAction(this::handleAddInstanceAction);
     }
 
     @NotNull
@@ -108,31 +105,38 @@ public ReadOnlyObjectProperty<BigtableTable> selectedTableProperty() {
     public ContextMenu createContextMenu(@NotNull TreeItemData item){
         ContextMenu menu = null;
         if (item.isProject()) {
-            var addInstance = new MenuItem("Add instance");
-            addInstance.setOnAction(actionEvent ->
-                    AddInstanceDialog
-                            .displayAndAwaitResult(item.getProjectId())
-                            .whenComplete(this::handleAddInstanceResult));
-            var removeProject = new MenuItem("Remove");
-            removeProject.setOnAction(actionEvent -> {
-                removeProjectService.setProjectId(item.getProjectId());
-                removeProjectService.setOnSucceeded(event -> ((RootTreeItem)treeView.getRoot()).removeProject((item.getProjectId())));
-                removeProjectService.setOnFailed(event -> AlertUtil.displayError("Unable to remove project", event));
-                removeProjectService.restart();
-            });
-
-            menu = new ContextMenu(addInstance, removeProject);
+            menu = new ContextMenu(getAddInstanceMenuItem(item), getRemoveProjectMenuItem(item));
         } else if (item.isInstance()) {
             var refreshTables = new MenuItem("Refresh tables");
             refreshTables.setOnAction(e -> ((InstanceTreeItem)item.getTreeItem()).loadChildren());
             menu = new ContextMenu(refreshTables);
+        } else if (item.isRoot()) {
+            menu = new ContextMenu(getAddInstanceMenuItem(item));
         }
 
         return menu;
     }
 
-    private void handleAddInstanceAction(ActionEvent ignore) {
-        AddInstanceDialog.displayAndAwaitResult().whenComplete(this::handleAddInstanceResult);
+    @NotNull
+    private MenuItem getRemoveProjectMenuItem(@NotNull TreeItemData item) {
+        var removeProject = new MenuItem("Remove");
+        removeProject.setOnAction(actionEvent -> {
+            removeProjectService.setProjectId(item.getProjectId());
+            removeProjectService.setOnSucceeded(event -> ((RootTreeItem)treeView.getRoot()).removeProject((item.getProjectId())));
+            removeProjectService.setOnFailed(event -> AlertUtil.displayError("Unable to remove project", event));
+            removeProjectService.restart();
+        });
+        return removeProject;
+    }
+
+    @NotNull
+    private MenuItem getAddInstanceMenuItem(@NotNull TreeItemData item) {
+        var addInstance = new MenuItem("Add instance");
+        addInstance.setOnAction(actionEvent ->
+                AddInstanceDialog
+                        .displayAndAwaitResult(item.getProjectId())
+                        .whenComplete(this::handleAddInstanceResult));
+        return addInstance;
     }
 
     private void handleAddInstanceResult(@Nullable BigtableInstance instance, Throwable throwable) {
diff --git a/src/main/java/com/erikmafo/btviewer/ui/queryresult/cell/CellTimestampDisplayMode.java b/src/main/java/com/erikmafo/btviewer/ui/queryresult/cell/CellTimestampDisplayMode.java
index 236080d..7ee4087 100644
--- a/src/main/java/com/erikmafo/btviewer/ui/queryresult/cell/CellTimestampDisplayMode.java
+++ b/src/main/java/com/erikmafo/btviewer/ui/queryresult/cell/CellTimestampDisplayMode.java
@@ -4,10 +4,10 @@
 
 public enum CellTimestampDisplayMode {
 
-    NONE("None"),
-    DATE_TIME("DateTime"),
-    MILLIS("Millis"),
-    MICROS("Micros");
+    NONE("Hide timestamps"),
+    DATE_TIME("Timestamps as date time"),
+    MILLIS("Timestamps as millis"),
+    MICROS("Timestamps as micros");
 
     private final String displayValue;
 
diff --git a/src/main/resources/css/global.css b/src/main/resources/css/global.css
new file mode 100644
index 0000000..3937176
--- /dev/null
+++ b/src/main/resources/css/global.css
@@ -0,0 +1,7 @@
+.has-spacing {
+  -fx-spacing: 10px;
+}
+
+* {
+  -fx-font-family: 'Verdana';
+}
\ No newline at end of file
diff --git a/src/main/resources/css/main.css b/src/main/resources/css/main.css
index 054d8c0..f7761da 100644
--- a/src/main/resources/css/main.css
+++ b/src/main/resources/css/main.css
@@ -1,12 +1,14 @@
+@import "global.css";
+
 .pane-view {
   -fx-padding: 10 10 10 10;
 }
 
-.has-spacing {
-  -fx-spacing: 10px;
+.split-pane {
+  -fx-box-border: transparent, -fx-background;
 }
 
-* {
-  -fx-font-family: 'Verdana';
+.main-content {
+  -fx-padding: 10 0 0 0;
 }
 
diff --git a/src/main/resources/css/project_explorer.css b/src/main/resources/css/project_explorer.css
new file mode 100644
index 0000000..0208683
--- /dev/null
+++ b/src/main/resources/css/project_explorer.css
@@ -0,0 +1 @@
+@import "global.css";
\ No newline at end of file
diff --git a/src/main/resources/fxml/main.fxml b/src/main/resources/fxml/main.fxml
index a9cd74d..deda343 100644
--- a/src/main/resources/fxml/main.fxml
+++ b/src/main/resources/fxml/main.fxml
@@ -1,27 +1,23 @@
 <?xml version="1.0" encoding="UTF-8"?>
 
-<?import javafx.geometry.Insets?>
 <?import javafx.scene.layout.BorderPane?>
 <?import javafx.scene.layout.VBox?>
+<?import javafx.scene.control.SplitPane?>
 <BorderPane xmlns:fx="http://javafx.com/fxml"
             fx:controller="com.erikmafo.btviewer.ui.MainController"
-            stylesheets="/css/main.css"
-            styleClass="pane-view">
+            stylesheets="/css/main.css">
     <top>
         <VBox>
-            <BorderPane.margin>
-                <Insets bottom="10"/>
-            </BorderPane.margin>
             <fx:include fx:id="menuBar" source="bigtable_menu_bar.fxml"/>
         </VBox>
     </top>
-    <left>
-        <fx:include fx:id="projectExplorer" source="project_explorer.fxml"/>
-    </left>
     <center>
-        <fx:include fx:id="queryResultView" source="query_result_view.fxml"/>
+        <SplitPane orientation="HORIZONTAL">
+            <fx:include fx:id="projectExplorer" styleClass="projects" source="project_explorer.fxml"/>
+            <SplitPane orientation="VERTICAL" styleClass="main-content">
+                <fx:include fx:id="queryResultView" source="query_result_view.fxml"/>
+                <fx:include fx:id="queryBox" source="query_box.fxml"/>
+            </SplitPane>
+        </SplitPane>
     </center>
-    <bottom>
-        <fx:include fx:id="queryBox" source="query_box.fxml"/>
-    </bottom>
 </BorderPane>
diff --git a/src/main/resources/fxml/project_explorer.fxml b/src/main/resources/fxml/project_explorer.fxml
index efaed71..6feea1d 100644
--- a/src/main/resources/fxml/project_explorer.fxml
+++ b/src/main/resources/fxml/project_explorer.fxml
@@ -1,10 +1,11 @@
-<?import javafx.scene.control.Button?>
 <?import javafx.scene.control.TreeView?>
 <?import javafx.scene.layout.VBox?>
+
 <VBox xmlns:fx="http://javafx.com/fxml"
       fx:controller="com.erikmafo.btviewer.ui.projectexplorer.ProjectExplorerController"
-      stylesheets="/css/main.css"
+      stylesheets="/css/project_explorer.css"
       styleClass="has-spacing">
-        <Button fx:id="addInstanceButton" styleClass="btn">Add Instance</Button>
-        <TreeView fx:id="treeView" visible="false" VBox.vgrow="ALWAYS"/>
+    <TreeView fx:id="treeView"
+              visible="false"
+              VBox.vgrow="ALWAYS"/>
 </VBox>
\ No newline at end of file
diff --git a/src/main/resources/fxml/query_result_view.fxml b/src/main/resources/fxml/query_result_view.fxml
index f52b2db..70e8e6a 100644
--- a/src/main/resources/fxml/query_result_view.fxml
+++ b/src/main/resources/fxml/query_result_view.fxml
@@ -6,7 +6,6 @@
 <?import javafx.scene.layout.Region?>
 <?import javafx.scene.layout.VBox?>
 <?import javafx.scene.control.ChoiceBox?>
-<?import javafx.scene.control.Label?>
 <VBox xmlns:fx="http://javafx.com/fxml"
       fx:controller="com.erikmafo.btviewer.ui.queryresult.QueryResultViewController"
       fx:id="vBox"
@@ -17,12 +16,13 @@
                 onAction="#handleTableSettingsButtonPressed"
                 mnemonicParsing="false"
                 text="Table Settings"
-                styleClass="btn"/>
+                styleClass="btn btn-sm btn-default"/>
         <Region HBox.hgrow="ALWAYS"/>
 
         <HBox styleClass="has-spacing">
-            <Label>Timestamp display: </Label>
-            <ChoiceBox fx:id="timestampDisplayModeChoiceBox"/>
+            <ChoiceBox
+                    fx:id="timestampDisplayModeChoiceBox"
+                    styleClass="btn btn-sm btn-default"/>
         </HBox>
     </HBox>
     <TreeTableView fx:id="tableView"