diff --git a/qtsgraph.cpp b/qtsgraph.cpp
index 98b96f8..07d6c38 100644
--- a/qtsgraph.cpp
+++ b/qtsgraph.cpp
@@ -305,7 +305,7 @@ void QTSGraph::paintEvent(QPaintEvent *event)
         p.drawText(2, Canvas.height() / 4 - 2, QString::number(mult * Canvas.height() / 4));
 
         p.drawLine(3 * Canvas.width() / 4, 0, 3 * Canvas.width() / 4, Canvas.height() - 1);
-        p.drawLine(0, 3 * Canvas.height() / 4 - 1, Canvas.width() - 1, 3 * Canvas.height() / 4 - correctY);
+        p.drawLine(0, 3 * Canvas.height() / 4 - correctY, Canvas.width() - 1, 3 * Canvas.height() / 4 - correctY);
         p.drawText(3 * Canvas.width() / 4 + 2, 12, QString::number(3 * Canvas.width() / 4));
         mult = correctY ? 1 : 3;
         p.drawText(2, 3 * Canvas.height() / 4 - 2, QString::number(mult * Canvas.height() / 4));
diff --git a/screenshots/coord-swap-yex.png b/screenshots/coord-swap-yex.png
new file mode 100644
index 0000000..d5e260f
Binary files /dev/null and b/screenshots/coord-swap-yex.png differ
diff --git a/screenshots/wincoordex.png b/screenshots/wincoordex.png
new file mode 100644
index 0000000..485106f
Binary files /dev/null and b/screenshots/wincoordex.png differ