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UI Guidelines

Gesture

Touch and hold

Multi-touch

Pinch out or pinch in

Pivot

Best practices

•

Carefully consider where you place UI components. Try to keep a 15-pixel margin around UI components and around

the edge of the screen, especially along the top and bottom of the screen. Otherwise, users might inadvertently open a

menu or display the application list.

•

Use a target area of at least 5.5 mm for custom UI components, or at least 4 mm if the component extends across the

full width of the screen. It's a good idea to test the size of the target area with users. Components need to be large

enough to touch with a finger, and this size depends on the layout of the screen and the proximity to other UI

components.

•

Add visual cues to encourage users to explore the gestures in your application. For example, you can add a slider that

users can use to adjust a value by dragging a finger across the component.

Expected result

This gesture highlights a sequence of characters, a word, a link, or an

item, such as an email or picture.

With two touch points, this gesture highlights a block of text or items.

Up to four simultaneous touch points are supported and they can be

application-specific.

This gesture zooms in to or out from an item.

This gesture rotates an item or the view.

Design principles