update the print help

src/root/gui/cubix/src/CXCanvas.cpp

@@ -1261,9 +1261,11 @@ void CXCanvas::InitInfos()
     AddShortcutsInfo("<ctrl> x", "cut the object under cursor");
     AddShortcutsInfo("<ctrl> v", "paste the last object copied");
     AddShortcutsInfo("<ctrl> d", "undraw the object under cursor (object not deleted)");
+    AddShortcutsInfo("<Maj> S", "Add selected object to stored spectra");
+
     AddShortcutsInfo("","");
-    AddShortcutsInfo("f", "start a new gamma fit, or process the fit when arrows are placed");
     AddShortcutsInfo("s", "Peak search");
+    AddShortcutsInfo("f", "start a new gamma fit, or process the fit when arrows are placed");
     AddShortcutsInfo("c", "clear the current Pad (arrows, fits...)");
     AddShortcutsInfo("","");
     AddShortcutsInfo("Gamma Gamma mode","");