My handwriting is so messy that I write with a ruler in daily life. I tried it with the ruler on the screen, and it’s not possible.
The words are ‘sucked’ like a magnet to the ruler and automatically draws a line.

It would be soooooo nice to be able to have the ruler not be ‘magnetic’ and write on it.

I can’t read my own handwriting without ruler and it looks very very stupid when I’m holding a real life ruler against my ipad screen in meetings…