As an expert user, you always prefer to use “Enter†key to click any button (so that you don’t have to shift your hand from keyboard to mouse and then vice versa) or if you are beginner user, you will simply click that button using mouse. It is usual way to input our choice in window especially when you have a dialog box showing some confirmation message or any message box.
Expert user will simply hit “Enter†key to press that button when he see that current focus is on the button he want to click.
But there is a problem with this “Enter†key. Notice the position of “Enter†key in keyboard. At the right hand side! And which finger you use to press? Your soft index finger! Or otherwise you will twist your wrist slightly towards right to press using middle/ring finger etc. This whole activity of pressing “Enter†button results more tear and wear to your pinky finger or otherwise to your wrist.
To overcome of overusing finger to hit “Enter†key, I always prefer to use space bar instead of clicking button by hitting “Enter†key. No! I don’t like to shift my hand from keyboard to mouse, just to click a button.
For quite sometime, I am using space bar to clicking button and its now become part of my regular working habit. I do really feel more comfortable in pressing space bar instead of clicking button as it’s require using my big thump which earlier requires pinky finger to do same thing.
Why not you try yourself?? Use space bar when you require clicking button in dialog box through hitting “Enter†button or clicking mouse button, and check how it works in your case. So next time when any application shows a dialog box for confirmation or alert message, just hit space bar instead of hitting “Enter†key or clicking button using mouse. And if default focus is not on button you want to press, use tab button to shift focus.

how spacebar works instead of enter key???????????????
Joe,
Actually, I was telling to use SpaceBar key instead of Enter key when it require clicking on button in dialog box. SpaceBar can never replace Enter key in operations like writing a document or giving command to system etc. My main objective while working is to minimize the use of mouse as much as possible and then I further wants move to minimize use of Enter key by using SpaceBar key instead in scenario like clicking button in dialog box etc.
gotcha