I have created a stacked bar chart and added a number of textboxes to annotate the chart using the drawing toolbar when the chart is in edit mode. This all works great apart from the fact that when I exit edit mode there is a drawing object (a textbox) that is rendered above the chart in the top left corner. However, when I edit the chart, the object disappears, and therefore cannot be be selected so I cannot delete it. It seems that somehow it has managed to be positioned outside of the visible canvas in edit mode. How can I delete this textbox in my chart?