Thumb-Zone and One-Handed Use Review
Check reach and comfort on large phones.
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Review control placement. Layout description with the position of main actions: [CONTROL_LAYOUT]. Typical users: [USERS]. Identify primary actions in hard-to-reach corners, small adjacent targets and gestures that need two hands. Suggest changes and a quick test walking with one hand. Return a table. Add a worked review: the primary Buy button sits at the top right; the back arrow top left; the menu top left; tap targets of 28 points close together. Move the primary action to the bottom, enlarge targets to at least the platform's guidance [VERIFY], and keep destructive actions away from frequent ones. Test with five people walking and using one hand. Add a worked example of a simple layout map: top zone hard to reach, middle zone comfortable, bottom zone easiest; place the primary action at the bottom, secondary in the middle and rarely used items at the top. Record what changes you make and why, and test with five users who hold their phones in different ways, including left-handed users and people using assistive technology. Check that moving controls does not hide content.
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