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Did the default positions of OK and Cancel CHANGE in Windows or web browsers?

Did the default positions of OK and Cancel CHANGE in Windows or web browsers?
  1. What will happen if you choose OK instead of cancel in this dialog box?
  2. Should OK button be on left or right?
  3. Does cancel go on the left or right?
  4. Is yes on the left or right?

What will happen if you choose OK instead of cancel in this dialog box?

Listing OK last improves the flow, because the dialog box "ends" with its conclusion. Also, as with Previous/Next, you could argue that OK is the choice that moves the user forward, whereas Cancel moves the user back.

Should OK button be on left or right?

Users fixate on each button only once and end on the primary action button. Putting the primary action left might make it easier for users to reach, but when you look at speed in terms of the user's mental processes and visual fixations, placing the primary action on the right of a dialog box is actually faster.

Does cancel go on the left or right?

So 'Cancel' is always on the right of OK button for Windows platform. Apple MacOS Guidelines says that “A button that initiates an action is furthest to the right. The Cancel button is to the left of this button.” So for MacOS users 'Cancel' is on the left of 'OK' button.

Is yes on the left or right?

Yes - Right; No - Left.

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