Regional undo/redo techniques for large interactive surfaces

Abstract

When multiple users are simultaneously sharing a workspace, it is not always clear what should happen when a user invokes an undo action. In this paper we explore different user interfaces for undo/redo for co-located collaborative workspaces, such as large interactive whiteboards. A preliminary study revealed that users expect neither a global nor personal undo, but rather a regional undo. We propose and evaluate three automatic regional undo/redo techniques (clustering, workspace, field of view) designed for a large interactive whiteboard. The results of the evaluation showed that an undo technique based on users' field of view was most preferred, while the content-based clustering technique produced most errors. We conclude with potential improvements to the developed techniques, and propose a set of design recommendations for implementing regional undo/redo on large interactive surfaces.

An exploratory study of how abundant display space may support data analysis

“…Although we saw use of abundant display space to support backtracking, probing for styles of interaction related to undo/redo techniques from the desktop such as [27] did not resonate with participants. Implicit use of space to support backtracking seems a sensible way of using abundant display space, and is similar to how [30] represent history.…”

Method for visualizing undone operations based on changes on desktop screen

“…As mentioned above, the problems of conventional undo operations are that (1) users might perform undo parts without knowing they have done so, (2) it is difficult to know with certainty what the undone content is, and (3) users cannot see undo operations outside the visible area. The proposed methods use the graphical changes to the desktop screen that are caused by undo operations in each application window.…”

“…Regional Undo/Redo [2] recovers input operations in each region by using a large interactive whiteboard designed for it. This method undoes the operation in the intended region without affecting ones in other regions even if multiple users simultaneously work on the whiteboard.…”

Interactive Presentation of Geo-Spatial Climate Data in Multi-Display Environments

“…That means it should observe personal, regional and object-based activities. Different approaches have been developed that consider either personal [25,26], regional [27,28] or object-based [23] undo/redo. Only a few approaches address the combination of personal, regional and/or object-based undo, but they are tailored to document editing.…”

“…Only a few approaches address the combination of personal, regional and/or object-based undo, but they are tailored to document editing. For large display environments, Seifried et al [27] utilize a combination of personal and regional undo.…”