diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index a79d9e2..626b152 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -1,168 +1,179 @@
 /* Atelier KDE Printer Host for 3D Printing
     Copyright (C) <2016>
     Author: Lays Rodrigues - laysrodrigues@gmail.com
             Chris Rizzitello - rizzitello@kde.org
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
 
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
 #include <QFileDialog>
 #include <KLocalizedString>
 #include <KStandardAction>
 #include <KActionCollection>
 #include <KXMLGUIFactory>
 #include <dialogs/connectsettingsdialog.h>
 #include <dialogs/profilesdialog.h>
 #include <widgets/gcodeeditorwidget.h>
 #include <set>
 #include <QToolButton>
 #include <memory>
+#include <QSplitter>
+#include <QHBoxLayout>
 #include <QStackedWidget>
 #include <widgets/3dview/viewer3d.h>
 #include <widgets/videomonitorwidget.h>
 
 MainWindow::MainWindow(QWidget *parent) :
     KXmlGuiWindow(parent),
     ui(new Ui::MainWindow),
     m_curr_editor_view(nullptr)
 {
     ui->setupUi(this);
     initWidgets();
     setupActions();
 }
 
 MainWindow::~MainWindow()
 {
     delete ui;
 }
 
 void MainWindow::initWidgets()
 {
     /*
     auto instance = qobject_cast<AtCoreInstanceWidget*>(ui->tabWidget->currentWidget());
     connectSettingsDialog->setFirmwareList(instance->firmwares());
     profilesDialog->setBaudRates(instance->baudRates());
     */
 
     setupLateralArea();
+
+    // View:
+    // Sidebar, Sidevar Controls, Printer Tabs.
+    // Sidevar Controls and Printer Tabs can be resized, Sidebar cant.
+    auto *centralLayout = new QHBoxLayout();
+    auto splitter = new QSplitter();
+    splitter->addWidget(m_lateral.m_stack);
+    splitter->addWidget(new QTabWidget());
+    centralLayout->addWidget(m_lateral.m_toolBar);
+    centralLayout->addWidget(splitter);
+    ui->centralwidget->setLayout(centralLayout);
 }
 
 // Move to LateralArea.
 void MainWindow::setupLateralArea()
 {
     m_lateral.m_toolBar = new QWidget();
     m_lateral.m_stack = new QStackedWidget();
     auto *buttonLayout = new QVBoxLayout();
 
     auto setupButton = [this, buttonLayout](const QString& s, QWidget *w) {
         QToolButton *btn = nullptr;
         btn = new QToolButton(m_lateral.m_toolBar);
         btn->setText(s);
         btn->setAutoExclusive(true);
         btn->setCheckable(true);
         m_lateral.m_stack->addWidget(w);
         m_lateral.m_map[s] = {btn, w};
 
         buttonLayout->addWidget(btn);
         connect(btn, &QToolButton::toggled, [this, w](bool checked) {
             if (checked)
                 m_lateral.m_stack->setCurrentWidget(w);
         });
     };
 
     auto *gcodeEditor = new GCodeEditorWidget(this);
      connect(gcodeEditor, &GCodeEditorWidget::updateClientFactory, this, [&](KTextEditor::View* view){
          guiFactory()->removeClient(m_curr_editor_view);
          guiFactory()->addClient(view);
          m_curr_editor_view = view;
      });
 
     setupButton(i18n("&3D"), new Viewer3D(this));
     setupButton(i18n("&GCode"), gcodeEditor);
     setupButton(i18n("&Video"), new VideoMonitorWidget(this));
-
+    buttonLayout->addStretch();
     m_lateral.m_toolBar->setLayout(buttonLayout);
     m_lateral.m_toolBar->show();
     m_lateral.m_stack->show();
-
-
 }
 
 void MainWindow::setupActions()
 {
     // Actions for the Toolbar
     QAction *action;
     action = actionCollection()->addAction(QStringLiteral("open_gcode"));
     action->setText(i18n("&Open GCode"));
     connect(action, &QAction::triggered, this, &MainWindow::openFile);
 
     action = actionCollection()->addAction(QStringLiteral("connect"));
     action->setText(i18n("&Connect"));
     connect(action, &QAction::triggered, [ & ]{
             std::unique_ptr<ConnectSettingsDialog> csd(new ConnectSettingsDialog);
             connect(csd.get(), &ConnectSettingsDialog::startConnection, [ & ](const QString& port, const QMap<QString, QVariant>& data) {
                 newConnection(port, data);
             });
             csd->exec();
     });
 
     action = actionCollection()->addAction(QStringLiteral("profiles"));
     action->setText(i18n("&Profiles"));
     connect(action, &QAction::triggered, [ & ] {
         std::unique_ptr<ProfilesDialog> pd(new ProfilesDialog);
         pd->exec();
     });
 
     #ifdef Q_OS_LINUX
     //only set icons from theme on linux
         actionCollection()->action(QStringLiteral("profiles"))->setIcon(QIcon::fromTheme("emblem-favorite"));
     #endif
     //use style's standardIcon for the icons we can.
     actionCollection()->action(QStringLiteral("open_gcode"))->setIcon(style()->standardIcon(QStyle::SP_DirOpenIcon));
 
     action = KStandardAction::quit(qApp, SLOT(quit()), actionCollection());
 
     setupGUI(Default, ":/atelierui");
 }
 
 void MainWindow::openFile()
 {
     QUrl fileNameFromDialog = QFileDialog::getOpenFileUrl(this, i18n("Open GCode"),
                               QDir::homePath(), i18n("GCode (*.gco *.gcode)"));
 /*
     if (!fileNameFromDialog.isEmpty()) {
         ui->gcodeEditorWidget->loadFile(fileNameFromDialog);
         ui->view3DWidget->drawModel(fileNameFromDialog.toString());
         m_openFiles.append(fileNameFromDialog);
     }
     */
 }
 void MainWindow::newConnection(const QString& port, const QMap<QString, QVariant>& profile)
 {
     /*
     const int tabs = ui->tabWidget->count();
     if(tabs == 1){
         auto instance = qobject_cast<AtCoreInstanceWidget*>(ui->tabWidget->currentWidget());
         if(!instance->connected()){
             instance->startConnection(port, profile);
             ui->tabWidget->setTabText(ui->tabWidget->currentIndex(), profile["name"].toString());
             return;
         }
     }
     auto newInstanceWidget = new AtCoreInstanceWidget();
     ui->tabWidget->addTab(newInstanceWidget, profile["name"].toString());
     newInstanceWidget->startConnection(port, profile);
     */
 }
diff --git a/src/mainwindow.ui b/src/mainwindow.ui
index a13c42d..3063a4c 100644
--- a/src/mainwindow.ui
+++ b/src/mainwindow.ui
@@ -1,57 +1,55 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
  <class>MainWindow</class>
  <widget class="QMainWindow" name="MainWindow">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>1074</width>
-    <height>627</height>
+    <width>0</width>
+    <height>0</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string>Atelier</string>
   </property>
-  <widget class="QWidget" name="centralwidget">
-   <layout class="QGridLayout" name="gridLayout"/>
-  </widget>
+  <widget class="QWidget" name="centralwidget"/>
   <widget class="QMenuBar" name="menubar">
    <property name="geometry">
     <rect>
      <x>0</x>
      <y>0</y>
      <width>1074</width>
      <height>36</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuFile">
     <property name="title">
      <string>Fi&amp;le</string>
     </property>
    </widget>
    <widget class="QMenu" name="menuEdit">
     <property name="title">
      <string>Edit</string>
     </property>
    </widget>
    <addaction name="menuFile"/>
    <addaction name="menuEdit"/>
   </widget>
   <widget class="QStatusBar" name="statusBar">
    <property name="contextMenuPolicy">
     <enum>Qt::NoContextMenu</enum>
    </property>
    <property name="sizeGripEnabled">
     <bool>false</bool>
    </property>
   </widget>
   <action name="actionTeste">
    <property name="text">
     <string>Teste</string>
    </property>
   </action>
  </widget>
  <resources/>
  <connections/>
 </ui>