How can I dispay a symbol in a text box from a dataset in a different layer. I normally use eg \l(3) but this will only apply to that particular layer.
Use \l(2.3) to show the plot symbol for the third dataplot in layer two. For dataplots in other graph windows you can use the Origin font (Origin.ttf) with all symbol shapes. If you don't already have that font you can download it here... http://www.originlab.com/FileExchange/details.aspx?fid=42