diff --git a/CMakeLists.txt b/CMakeLists.txt
index 58093ce..d0bd9ec 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@ cmake_policy(SET CMP0072 NEW) #  FindOpenGL prefers GLVND by default
 project(qad)
 set(qad_MAJOR    2)
 set(qad_MINOR    6)
-set(qad_REVISION 0)
+set(qad_REVISION 1)
 set(qad_SUFFIX   )
 set(qad_COMPANY  SHS)
 set(qad_DOMAIN   org.SHS)
diff --git a/libs/graphic/graphic.cpp b/libs/graphic/graphic.cpp
index a1c6103..65df99e 100644
--- a/libs/graphic/graphic.cpp
+++ b/libs/graphic/graphic.cpp
@@ -146,7 +146,7 @@ Graphic::Graphic(QWidget * parent): QFrame(parent), canvas(0), line_x_min(this),
 	icon_pause_f = QImage(":/icons/pause-front.png");
 	aupdate = grid = isFit = navigation = true;
 	aalias = bufferActive = isOGL = cancel = guides = hasLblX = hasLblY = isHover = false;
-	pause_ = only_expand_x = only_expand_y = m_LODOptimization = false;
+	pause_ = only_expand_x = only_expand_y = m_LODOptimization = was_trace = false;
 	limit_.setCoords(-DBL_MAX, -DBL_MAX, DBL_MAX, DBL_MAX);
 	eminx = eminy = DBL_MAX;
 	emaxx = emaxy = DBL_MIN;
@@ -350,6 +350,8 @@ void Graphic::procZoom(QPointF view_center, double dzoom, Qt::KeyboardModifiers
 			selrect.setRect(px - (px - selrect.x()) * scl, selrect.y(), selrect.width() * scl, selrect.height());
 		if (km == Qt::ShiftModifier)
 			selrect.setRect(selrect.x(), py - (py - selrect.y()) * scl, selrect.width(), selrect.height() * scl);
+		if (km == Qt::AltModifier)
+			selrect.translate((dzoom > 0. ? 1. : -1.) * selrect.width() / 2., 0.);
 	}
 }
 
@@ -596,14 +598,14 @@ void Graphic::canvasMouseDoubleClickEvent(QMouseEvent * ) {
 
 void Graphic::canvasWheelEvent(QWheelEvent * e) {
 #if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
-	emit graphicWheelEvent(canvas2real(e->position()), e->angleDelta().y()/* TODO: test use angleDelta()*/);
+	emit graphicWheelEvent(canvas2real(e->position()), e->angleDelta().y());
 #else
 	emit graphicWheelEvent(canvas2real(QPointF(e->pos())), e->delta());
 #endif
 	if (gestures) return;
 	if (!navigation) return;
 #if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
-	procZoom(e->position(), e->angleDelta().y(), e->modifiers());
+	procZoom(e->position(), e->modifiers() == Qt::AltModifier ? e->angleDelta().x() : e->angleDelta().y(), e->modifiers());
 #else
 	procZoom(e->pos(), e->delta(), e->modifiers());
 #endif
@@ -1426,6 +1428,7 @@ void Graphic::drawGuides() {
 	QPointF rpos = canvas2real(apos);
 	QString str;
 	str = pointCoords(rpos) + fp_size;
+	bool trace_found = false;
 	auto trace_axis_func = [&](bool on_x, double cursor) {
 		if (curTrace >= 0 && curTrace < graphics.size()) {
 			auto & t(graphics[curTrace]);
@@ -1447,6 +1450,7 @@ void Graphic::drawGuides() {
 					rpos = pol[index];
 					apos = real2canvas(rpos).toPoint();
 					str = pointCoords(pol[index]) + fp_size;
+					trace_found = true;
 					emit graphicTraceEvent(curTrace, rpos);
 				}
 			}
@@ -1478,11 +1482,12 @@ void Graphic::drawGuides() {
 					}
 				}
 			}
-			if (gr >= 0) {
-				apos = real2canvas(rpos).toPoint();
-				str = " " + graphics[gr].name + ": " + pointCoords(rpos) + fp_size;
-				emit graphicTraceEvent(curTrace, point);
-			}
+		}
+		if (gr >= 0) {
+			apos = real2canvas(rpos).toPoint();
+			str = " " + graphics[gr].name + ": " + pointCoords(rpos) + fp_size;
+			trace_found = true;
+			emit graphicTraceEvent(gr, rpos);
 		}
 	};
 	switch (floating_axis_type) {
@@ -1497,6 +1502,9 @@ void Graphic::drawGuides() {
 		break;
 	default: break;
 	}
+	if (was_trace && !trace_found)
+		emit graphicTraceEvent(-1, QPointF());
+	was_trace = trace_found;
 	painter->drawLine(0, apos.y(), wid, apos.y());
 	painter->drawLine(apos.x(), 0, apos.x(), hei);
 	QPoint p = apos + QPoint(font_sz.height() / 4., -font_sz.height() / 4.);
diff --git a/libs/graphic/graphic.h b/libs/graphic/graphic.h
index 8b44bcd..61d834c 100644
--- a/libs/graphic/graphic.h
+++ b/libs/graphic/graphic.h
@@ -429,7 +429,7 @@ protected:
 	double eminx, eminy, emaxx, emaxy, pause_phase, gesture_angle;
 	int lastw, lasth, min_repaint_int, timer_pause, thick;
 	bool aalias, aupdate, grid, guides, isFit, isOGL, isHover, bufferActive, cancel, pause_, gestures, m_LODOptimization, m_fakeGL, need_createGL;
-	bool hasLblX, hasLblY, navigation, only_expand_y, only_expand_x, is_lines_update, leg_update, visible_update, fullscr, need_mouse_pan;
+	bool hasLblX, hasLblY, navigation, only_expand_y, only_expand_x, is_lines_update, leg_update, visible_update, fullscr, need_mouse_pan, was_trace;
 
 protected slots:
 	void canvasPaintEvent();