When sharing or filing a pattern, it is good to have a motif or chart.
I have just started to draw them on the computer.
There is dedicated crochet software available for sale on the web, but a free one is for example Inkscape. It is much like Adobe Illustrator, but free. This is open source software.
There are some tutorials on the web and YouTube to learn the basics of this program.
I am still learning, and am determined to master Inkscape!
If you see any of the charts I have drawn, please don't be harsh!
Once I get the hang of it a bit more I will write a tutorial.