diff --git a/src/src/UI/Window/QDicomViewer.cpp b/src/src/UI/Window/QDicomViewer.cpp
index 7d2a5aa..064e4b3 100644
--- a/src/src/UI/Window/QDicomViewer.cpp
+++ b/src/src/UI/Window/QDicomViewer.cpp
@@ -30,6 +30,7 @@ QDicomViewer::QDicomViewer(QWidget *parent) : QMainWindow(parent),
     ui->setupUi(this);
     this->statusBar()->showMessage(tr("Ready"));
     ui->toolBar->setViewManager(ui->viewContainer->getViewManager());
+    this->setWindowState(Qt::WindowState::WindowMaximized);
     QWidget::setWindowTitle(Project_NAME);
 
     this->Initial();