During the panel upgrade I recalled an article that I read years ago in the RSGB RadComm magazine. It was in 1973 and a diagram stuck in my mind. This shows the expected relationship that an operator of some equipment would expect when changing the settings of the controls. This kind of thing is worth bearing in mind when you are putting your own equipment together. I guess they call this "Human Factors" now everything is in software with physical controls being replaced by touch sensitive screens and their software.
The controls implemented in software are great if they are done well with an end user in mind.