Wacom input drivers

I bought a Wacom Intuos CTL-4100, since I need to draw some schemes during online meetings and I am really bad with the mouse. I installed libwacom and xournalpp from SBo.  Everything works as it should on Slackware -current, however it does not work on 14.2.
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Venn diagrams online

I’ve been preparing some figures, where I need to include Venn diagrams. I am looking to make them proportional to the values. So far, I have not found a way to do this in Gnumeric, WPS Office LibreOffice or OpenOffice.org. I guess, I should find the time to learn a little bit more of R. Meanwhile, I’ve been searching for a quick solution online.

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