I have a block diagram finished, but I need help in creating a legend for it.
I'm trying to create a legend that looks like that picture below. I want to be able to 1st create this type of graphic and also be able to x & y shift the entire graphic in my block diagram.
I'm new to TeX, but I manged to learn a lot in the past few days. Yet, I looked for a way to implement this, but no luck.