As someone who works in sound, one of the basic regular parts of my job is to have a patching sheet. For those who I’ve already lost and have no clue what this is, an audio patch sheet is a document used to list the inputs and outputs for everything on the stage that you are using for live sound. Making a list is the easiest part of it. Having it be comprehensible by everyone else who reads it is where things start to get difficult. Why is this such a difficulty? The short answer is typically one of two reasons:

Either your handwriting sucks and not everyone uses the same short hands as you do

Or the other person genuinely has no idea how to read the patch list