He made the minimum

I wanted a replacement keyboard, with the sound control buttons, though missing a button to mute the sound, I wanted the calculator.
So this keyboard is in line with my expectations.
However, there is a button which I have not yet grasped the full significance is that SHIFT is pressed long (the case when I select multiple objects), freeze the action and allows me more make a striking example. It is then that I release the key and I reactive in order to complete my action.
It's a bit confusing, but nothing major. Otherwise, a saw thing is to recall the various key combinations ALT + X or + C etc.