diff --git a/rtdata/languages/default b/rtdata/languages/default
index 9fd301eba..399d8f041 100644
--- a/rtdata/languages/default
+++ b/rtdata/languages/default
@@ -2880,7 +2880,7 @@ TP_PERSPECTIVE_CAMERA_SHIFT_HORIZONTAL;Horizontal shift
 TP_PERSPECTIVE_CAMERA_SHIFT_VERTICAL;Vertical shift
 TP_PERSPECTIVE_CAMERA_YAW;Horizontal
 TP_PERSPECTIVE_CONTROL_LINES;Control lines
-TP_PERSPECTIVE_CONTROL_LINES_TOOLTIP;Correct perspective distortion by drawing control lines.\n\nTo draw a line, activate either the vertical or horizontal drawing button. Hold down the control key and click-and-drag to draw a line. At least two vertical lines are required for vertical perspective correction. The same is true for horizontal correction. Click the tick mark button to apply perspective correction.
+TP_PERSPECTIVE_CONTROL_LINES_TOOLTIP;<b>Ctrl</b>+<b>drag</b>: Draw new line\n<b>Right-click</b>: Delete line
 TP_PERSPECTIVE_HORIZONTAL;Horizontal
 TP_PERSPECTIVE_LABEL;Perspective
 TP_PERSPECTIVE_METHOD;Method
diff --git a/rtgui/perspective.cc b/rtgui/perspective.cc
index a113a13f9..a8a1f73d3 100644
--- a/rtgui/perspective.cc
+++ b/rtgui/perspective.cc
@@ -204,8 +204,8 @@ PerspCorrection::PerspCorrection () : FoldableToolPanel(this, "perspective", M("
     lines->callbacks = std::make_shared<LinesCallbacks>(this);
 
     Gtk::HBox* control_lines_box = Gtk::manage (new Gtk::HBox());
-    control_lines_box->set_tooltip_text( M("TP_PERSPECTIVE_CONTROL_LINES_TOOLTIP") );
     Gtk::Label* control_lines_label = Gtk::manage (new Gtk::Label (M("TP_PERSPECTIVE_CONTROL_LINES") + ": "));
+    control_lines_label->set_tooltip_markup( M("TP_PERSPECTIVE_CONTROL_LINES_TOOLTIP") );
     control_lines_box->pack_start(*control_lines_label, Gtk::PACK_SHRINK);
     control_lines_box->pack_start(*lines_button_edit);
     control_lines_box->pack_start(*lines_button_apply);