i use draw.io for a long time and it gives me 'birds view'
I know about the tool, but never tried it, will try it out.
Same. I find it so much easier to navigate flow charts than paragraphs of textual documentation. I'm sure other people with dyslexia on the team would also appreciate it.
That said though, if a function becomes so convoluted that you find yourself needing to document it like this, it's usually time to break the function up. Keep the flowcharts to plan and/or map out the bigger picture.
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