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Using reversible user options for interface design

One of the general principles of user interface design should be that when a user has to choose an option, it should be easily reversible – and it should be obvious how to do so.

Take a look at this grab, from Apple’s Keynote on iOS.

When I tapped on the button to insert an image, the iPad gave me the standard privacy control asking if I wanted to grant Keynote access to my photos. I accidentally hit “no”.

Now, whenever I open up the Photos control, I don’t see any images – but I do see an explanation of why I don’t see anything, and instructions on how to change that option if I wish.

That’s good design. It’s reversible, and it tells me how.

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