Marcelo Paiva
A woman with a ponytail sits in a wheelchair at a tray table, holding a long pointer stick.

Success criterion 2.5.1 · Level A

Pointer Gestures

“Pinch to zoom? I use a head pointer. I've got one point of contact, and it's doing its best.”

Who this helps: Motor Impairments

Success criterion 2.5.1 · Level A

Pointer Gestures

Anything that uses multipoint or path-based gestures can also be operated with a single pointer without a path-based gesture.

Principle 2: Operable · Guideline 2.5: Input Modalities

What each role can do

Product manager
Require a single-tap alternative for every gesture.
Designer
Add visible controls, such as plus and minus buttons, next to swipe and pinch interactions.
Developer
Provide click or tap equivalents for pinch, multi-finger and swipe-path gestures.
Tester
Operate every gesture-driven feature with a single pointer and no dragging.

Once it is fixed

“Plus and minus buttons! One tap and I'm zooming like everyone else.”

Next criterion: 2.5.2 Pointer Cancellation