diff --git a/doc/docu.odt b/doc/docu.odt
index fcd103e..d1a3ccc 100644
Binary files a/doc/docu.odt and b/doc/docu.odt differ
diff --git a/doc/docu.pdf b/doc/docu.pdf
index a25e75d..6d332f2 100644
Binary files a/doc/docu.pdf and b/doc/docu.pdf differ
diff --git a/emulator/qt/mainwindow.cpp b/emulator/qt/mainwindow.cpp
index 10dd912..99b2ae2 100644
--- a/emulator/qt/mainwindow.cpp
+++ b/emulator/qt/mainwindow.cpp
@@ -64,7 +64,7 @@ void MainWindow::draw_rectangle(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t
 {
     QPainter painter(&(image));
     painter.setPen(QColorFromRGB565(color));
-    painter.drawRect(qMin(x1,x2),qMin(y1,y2),abs((int)x2-(int)x1)+1,abs((int)y2-(int)y1)+1);
+    painter.drawRect(qMin(x1,x2),qMin(y1,y2),abs((int)x2-(int)x1),abs((int)y2-(int)y1));
     update();
 }