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DAZ implements a navigation technique invented by Takeo Igarashi and Ken Hinckley for browsing 2D documents that integrates rate-based scrolling with automatic zooming. The viewport automatically zooms out when the user scrolls rapidly so that the perceptual scrolling speed in screen space remains constant. As a result, the user can efficiently and smoothly navigate through a large document without becoming disoriented by extremely fast visual flow.

The (now inactive) VGLViewer project uses the sdaz-stable-0.1 branch of SDAZ and has a page of documentation that is valid for that tag.