cuistojs

Hi, I use Jaspersoft Studio 6.11.0 and when I export my report in excel (.xlsx) the charts size appear to be in "fit to cell size" and not "in original size". I spend a lot of time to find hacks and parameters but I can't find a solution. I want to ensure that chart appear in it's original size in excel. The original size of the chart is 640x480. I put a screen capture as you can easily see the problem Thanks in advance.