Zooming works with mouse buttons. double-click-left-button zooms in single-click-right-button zooms out holding CTRL zooms only the x-axis holding SHIFT zooms only the y-axis format in params.txt: 1 (number) p1|... p2|... ... p6|... -------- xAxisImgName= yAxisImgName= -------- y1ImgName=... y2ImgName=... noLegend (if you don't want a legend) y6ImgName=... tag names in params.txt: xAxisImgName (make sure this goes before yAxisImgName) yAxisImgName y1ImgName=... These determine the image names in the y2ImgName=... legend. If no image names are specified, then a text-output of the equation is used. instead of "ln(x)", use "log(x)/0.434" because the original program doesn't seem to recognize "ln"