After 25 years of the start of the Euler nucleus the software has reached version 20. This is a good moment to thank all supporters and users of Euler. You were a great help along the way.
Between Version 19 and Version 20 there were only minor changes, which nevertheless sum up to a better experience for the user. The documentation has been improved continuously along the way.
For Version 20, I had some fun implementing XKCD style graphics. Here is an example.
The trick is to use random wiggles in drawing. In Euler, I use a random walk, which overlays each line and curve. The font is „Humor Sans“, which is available in the net. I expanded the setfont() function, so that it can use a new font for one session. Here is the Euler notebook which created this drawing.