Letter size fix config iDraw

Fixes and adaptation for A4 letter. This video was made thanks to the config. 👇

Name		Name	Last commit message	Last commit date
Latest commit coppermilk Update README.md Aug 24, 2022 ed8c562 · Aug 24, 2022 History 11 Commits
README.md		README.md
axidraw_conf.py		axidraw_conf.py
plotter.gif		plotter.gif

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