I have created a combination chart (stacked column with line) where I set the line width to zero and assigned url image as a marker. The symbol image is a black rectangle approximately 60 pixels wide x 5 pixels tall. Unfortunately, the image overruns the legend and I do need to display this series in the legend.
Is there an undocumented mechanism to assign a seperate symbol url (mini version) to the legend vs. the marker?
FYI - I also tried setting "showInLegend: false" and using renderer to place small rectangle and text at the end of the legend, but unfortunately this did not display when exported. I also tried a similar approach with placing labels, but I could not find an appropriate ascii character to use in place of the symbol and enlarging an underrscore's font size also created issues when exporting.