Computer keyboards are far too complex…there are options built in that I never ever use…the keys just sit there doing nothing other than acting as targets for typing errors, of which I make many, dirt collectors and a source of visual distractions.
Today’s invention is therefore a keyboard overlay which can be fashioned to correspond with any individual’s preferences.

You would specify which keys you never press (eg about 35% of the ones on the machine I’m using now). Once you provided details of the model of machine you were using, this would allow an overlay to be created which clipped in place…covering the useless ones with a connected grid of blanks (in the correct uniform colour), whilst leaving the others unaffected.