10 december, 2020
The second principle dwells on UI components and navigation must be operable in terms of the availability of functionality from a keyboard, the importance of negative space and touchscreen gestures, and how physical movements improve digital experiences.
Keyboard control for touchscreen devices
Separation of keys should be obvious and more predictable for users with visual limitations. Minimise unintended presses with guarded keys, spaced or differently shaped for people with dexterity issues.
Touch target size and spacing
Make sure that touch targets are at least 9mm x 9mm regardless of device and surrounded by negative space.
Simplify touchscreen gestures by a two-step process of focusing and activating elements. Discover design alternatives to the apps settings with a simple tap or swipe gesture for the benefit of users with dexterity issues
Leveraging the mouseup or touchend event to launch actions helps prevent inadvertent actions during interaction.
Device Manipulation Gestures
Provide work-around features that let the user simulate device shakes or tilts from an onscreen menu to benefit users having difficulty holding a mobile device. Provide touch and keyboard operable alternative control options instead.
Placing buttons where they are easy to access
Place Interactive elements where they can be easily reached regardless how it is held.
Be conscious of left and right-handed, one-handed users, and thumb activations. The objective is to be flexible.