OK/Cancel on left/right?

1. Should OK button be on left or right?
2. Does cancel go on the left or right?
3. Why is the OK button on the right?
4. Is yes on the left or right?

Should OK button be on left or right?

Listing OK first supports the natural reading order in English and other languages that read left-to-right. Many other button sets have a natural progression (say, Yes / No or Previous / Next). You should always list these so that the reading order matches the logical order — in this case, OK / Cancel.

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.

Why is the OK button on the right?

This button placement works because it maps to the user's left-to-right reading and navigating direction, where right is the direction to progress and left is the direction to regress. 'Ok' and 'Cancel' buttons in dialog boxes should follow a similar interaction pattern because they function like pagination buttons.

Is yes on the left or right?

Yes - Right; No - Left.