It is now increasingly common to extend private workstations with large public displays into a shared multi-display environment. Mouse-based interaction across multiple displays provides a convenient way to quickly shift between private work on the personal monitor and tightly coupled collaboration on shared display spaces. However, mouse pointer navigation can be negatively influenced by display factors in the environment and thereby limits fluid interaction across displays. In this paper, we present experiences with mouse-controlled multi-display environments. Based on an experiment comparing four mouse pointer navigation techniques, we show limitations of mouse-controlled interaction in multi-display environments and suggest improvements to enhance the user interface experience with low-cost multi-display settings. Categories and Subject Descriptors H.5.2 [Information Interfaces and Presentation]: User Interfaces--Input devices and strategies (e.g., mouse, touchscreen) General Term...