@inproceedings{82,
  author = {Chia Shen and Mark Hancock and Clifton Forlines and Fr\ Vernier},
  title = {CoR²Ds: Context-Rooted Rotatable Draggables},
  abstract = {<p>We present a new popup widget, called CoR\²Ds (Context-Rooted Rotatable Draggables), designed for multi-user direct-touch tabletop environments. CoR\²Ds are interactive callout popup objects that are visually connected (rooted) at the originating displayed object by a semi-transparent colored swath. CoR\²Ds can be used to bring out menus, display drilled-down or off-screen ancillary data such as metadata and attributes, as well as instantiate tools. CoR\²Ds can be freely moved, rotated, and re-oriented on a tabletop display surface by fingers, hands, pointing devices (mice) or marking devices (such as a stylus or light pen). CoR\²Ds address five issues for interaction techniques on interactive tabletop display surfaces: occlusion, reach, context on a cluttered display, readability, and concurrent/coordinated multi-user interaction. In this paper, we present the design, interaction and implementation of CoR\²Ds. We also discuss a set of current usage scenarios.</p>
},
  year = {2005},
  journal = {CHI 2005 Extended Abstracts},
  pages = {1781\textendash1784},
  publisher = {ACM Press},
  address = {New York, NY, USA},
  isbn = {1-59593-002-7},
  doi = {10.1145/1056808.1057021},
}