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Summary: Phosphor: Explaining Transitions in the User Interface
Using Afterglow Effects
Patrick Baudisch, Desney Tan, Maxime Collomb, Dan Robbins,
Ken Hinckley, Maneesh Agrawala, Shengdong Zhao, and Gonzalo Ramos
Microsoft Research, One Microsoft Way, Redmond, WA 98052, USA
{baudisch, desney, kenh, dcr}@.microsoft.com, maneesh@cs.berkeley.edu
collomb@lirmm.fr, {sszhao, bonzo}@dgp.toronto.edu
ABSTRACT
Sometimes users fail to notice a change that just took place
on their display. For example, the user may have acciden-
tally deleted an icon or a remote collaborator may have
changed settings in a control panel. Animated transitions
can help, but they force users to wait for the animation to
complete. This can be cumbersome, especially in situations
where users did not need an explanation. We propose a
different approach. Phosphor objects show the outcome of
their transition instantly; at the same time they explain their
change in retrospect. Manipulating a phosphor slider, for
example, leaves an afterglow that illustrates how the knob
moved. The parallelism of instant outcome and explanation
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