Hi there,
ok, I made a bunch of changes to outlines, sizes, padding, etc and now it seems to work fine under High-DPI resp. when zoomin in and out. The style of the chart changed a little but it is now usable with 4K monitors and e.g. zoom 175%
Here a screenshot with 50% Zoom. I also added a little feature to add a variable to store the dates of holidays or a year so that they are colored in the color of the weekends
