Interaction Placement

Distance between control and object

Feedback co-located with the action

Proximity and saccades

Thumb zone and primary-action placement

Edge and corner accessibility

Positional stability of frequent actions

Spatial isolation of destructive actions

Overlay anchoring

Overlay occlusion of the object

Viewport compression after the keyboard

Above the fold and below it

Fixed chrome and safe areas

Separating action and reading regions

Semantic conventions of position