[rlue]

The better example for this design principle is the big green button on copy machines. The copier has many functions, but 99% of users don't bother with 99% of them.

For a little history on this design, see https://athinkingperson.com/2010/06/02/where-the-big-green-c...

[a96]

That's a good button on a copier or a microwave. Not on a CNC mill, CAD software, text editor, chemical plant, tractor, knife... basically any object in the world that doesn't have one obvious function.