Depth · Distinct visual layers and realistic motion convey hierarchy, impart vitality, and facilitate understanding. Touch and discoverability heighten delight and enable access to functionality and additional content without losing context. Transitions provide a sense of depth as you navigate through content.

Apple

Depth

Apple Human Interface Guidelines

Apple design principles

Design

Apple

Guidelines

iOS

Human interface

Torsten Caspar

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Clarity · Throughout the system, text is legible at every size, icons are precise and lucid, adornments are subtle and appropriate, and a sharpened focus on functionality motivates the design.

Apple

Clarity · Negative space, color, fonts, graphics, and interface elements subtly highlight important content and convey interactivity.

Apple

Deference · Fluid motion and a crisp, beautiful interface help people understand and interact with content while never competing with it. Content typically fills the entire screen, while translucency and blurring often hint at more.

Apple

Deference · Minimal use of bezels, gradients, and drop shadows keep the interface light and airy, while ensuring that content is paramount.

Torsten Caspar

Aesthetic integrity · It represents how well an app’s appearance and behavior integrate with its function. For example, an app that helps people perform a serious task can keep them focused by using subtle, unobtrusive graphics, standard controls, and predictable behaviors.

Apple

Aesthetic integrity · An immersive app, such as a game, can deliver a captivating appearance that promises fun and excitement, while encouraging discovery.

Torsten Caspar

Consistency · A consistent app implements familiar standards and paradigms by using system-provided interface elements, well-known icons, standard text styles, and uniform terminology. The app incorporates features and behaviors in ways people expect.

Apple

Direct Manipulation · The direct manipulation of onscreen content engages people and facilitates understanding. Users experience direct manipulation when they rotate the device or use gestures to affect onscreen content. Through direct manipulation, they can see the immediate, visible results of their actions.

Apple

Feedback · It acknowledges actions and shows results to keep people informed. The built-in iOS apps provide perceptible feedback in response to every user action.

Apple

Feedback · Interactive elements are highlighted briefly when tapped, progress indicators communicate the status of long-running operations, and animation and sound help clarify the results of actions.

Apple

Metaphors · People learn more quickly when an app’s virtual objects and actions are metaphors for familiar experiences—whether rooted in the real or digital world.

Torsten Caspar

Metaphors · They work well in iOS because people physically interact with the screen. They move views out of the way to expose content beneath. They drag and swipe content. They toggle switches, move sliders, and scroll through picker values. They even flick through pages of books and magazines.

Torsten Caspar

User Control · Throughout iOS, people—not apps—are in control. An app can suggest a course of action or warn about dangerous consequences, but it’s usually a mistake for the app to take over the decision-making. The best apps find the correct balance between enabling users and avoiding unwanted outcomes.

Apple

User Control · An app can make people feel like they’re in control by keeping interactive elements familiar and predictable, confirming destructive actions, and making it easy to cancel operations, even when they’re already underway.

Apple

From such a gentle thing, from such a fountain of all delight, my every pain is born.

Michelangelo

When you love something, you're gonna be the best at it.

Justin Chon

I did a walk in 1973 illegally in the northern side of the Sydney Harbor Bridge.

Philippe Petit

However bad life may seem, there is always something you can do, and succeed at. While there's life, there is hope.

The Theory of Everything

I'm constantly changing, I'm constantly growing. I think I'm a little controversial... I just try and keep some mystery, so hopefully people can't really put their finger on it.

Evan Rachel Wood

Honesty will never break you.

Kate Hudson

I grew up in a happy household.

Kristen Stewart

We know it is impossible to go on finding, moving and wasting oil, leveling forests, paving land, dumping poisons, and multiplying our numbers. A new way of life, a new set of thoughts must be found.

Donella Meadows

I prioritise story over science, but not at the expense of being really stupid about it.

Alastair Reynolds

Delete the negative; accentuate the positive.

Donna Karan

I see myself being a father, hopefully a husband, but I'm very gun-shy. The older I get, the further the goalpost.

Esai Morales

Rabid fans were literally jumping into the camera.

Penelope Spheeris

I'm beginning to understand myself. But it would have been great to be able to understand myself when I was 20 rather than when I was 82.

Dave Brubeck

Careful?! Was my mother careful when she stabbed me in the heart with a coat hanger while I was still in womb?

Trey Parker

If you ever have the good fortune to create a great advertising campaign, you will soon see another agency steal it. This is irritating, but don't let it worry you; nobody has ever built a brand by imitating somebody else's advertising.

David Ogilvy

A hidden connection is stronger than an obvious one.

Heraclitus

If we vote to Leave and take back control, all sorts of opportunities open up. Including doing new free trade deals around the world, restoring Britain's seat on all sorts of international bodies, restoring health to our democracy and belief to our democracy.

Boris Johnson

With EarthEcho Expedition: Acid Apocalypse, we are working with youth leaders and noted experts on the changing chemistry of our ocean to help illuminate one of our most pressing and inscrutable environmental issues.

Philippe Cousteau, Jr.

I'm an atheist and a humanist, so I have no desire to evangelize anyone.

Rae Carson

I like being the center of attention. I want to be in the limelight, basically.

Nash Grier

I am conscious of trying to stretch the boundaries of non-fiction writing. It's always surprised me how little attention many non-fiction writers pay to the formal aspects of their work.

Alain de Botton

I was asked by a group to write a song on the theme of brotherhood. This was before women's liberation, when brotherhood meant men and women both, so I wrote the song. Since I had always been very fond of the Passion Chorale, I wrote words to that great piece.

Tom Glazer

One of the problems the internet has introduced is that in this electronic village, all the village idiots have internet access.

Peter Nelson

The harder they hit us the louder we become kind of like the skin on a drum.

Michael Franti