diff --git a/qad/graphic/graphic.cpp b/qad/graphic/graphic.cpp
index 8a06b3d..cfd1ad9 100644
--- a/qad/graphic/graphic.cpp
+++ b/qad/graphic/graphic.cpp
@@ -638,6 +638,12 @@ void Graphic::setHistorySize(double val) {
 }
 
 
+void Graphic::setMaxVisibleTime(double val) {
+	visible_time = val;
+	if (isFit) on_buttonAutofit_clicked();
+}
+
+
 void Graphic::setOnlyExpandY(bool yes) {
 	only_expand_y = yes;
 	ui->checkExpandY->blockSignals(true);
diff --git a/qad/graphic/graphic.h b/qad/graphic/graphic.h
index f07b306..314a4a0 100644
--- a/qad/graphic/graphic.h
+++ b/qad/graphic/graphic.h
@@ -265,7 +265,7 @@ public slots:
 	void setButtons(Graphic::Buttons b);
 	void setButtonsPosition(Graphic::Alignment a);
 	void setHistorySize(double val);
-	void setMaxVisibleTime(double val) {visible_time = val;}
+	void setMaxVisibleTime(double val);
 	void setAutoXIncrement(double val) {inc_x = val;}
 	void setLimit(const QRectF & val) {limit_ = val;}
 	void setMargins(const QRect & val) {margins_ = val; update();}