@Shogmaster @Qyygle Here's a capture from the MS Whiteboard app on my C940 14 with UHD screen. The longer lines on the left were done with the help of a ruler, and show some sort of high frequency tremor that I'm working with Lenovo tech support to try and figure out (maybe pen, maybe digitizer; might have to send the whole thing in for repair/replacement). As it stands, I find the device's performance on this issue completely unacceptable. I've been looking at the discussions around grid density, and have come up with a couple of doubts. Can we be sure that the line waviness has to do with the density per-se? Do we know if Clip Studio's vector layer captures all the pints reported by the digitizer, or is actually just computing the nodes needed to represent a given curve? Unless there's some info from the developer stating the former, I'd go with the latter since that's consistent with what we do know: a wavier line in vector format usually needs more nodes than a straighter one! Another thing that we know is that different pens on the same digitizer can give results worlds apart: from damn-near perfect lines to super-wavy ones at the change of a stylus. Wouldn't that point to some sort of matching being needed between the screen/digitizer and specific pens? Thanks in advance for your insights and inputs.