US Patent 10025477 Nested zoom in windows on a touch sensitive device

Certain aspects of the present disclosure relate to a technique for generating nested zoom in windows on a touch sensitive device. A first portion of the user content is zooming into by touching the display screen in a proximity of the first portion using the touch input device while retaining an original zoom size of a remaining portion of the user content. A second portion of a zoomed in first portion of the user content is zooming into by touching the display screen in a proximity of the second portion using the touch input device while retaining an original zoom size of the zoomed in first portion.