User interfaces for multiple display regions are described. One embodiment provides an array of non-overlapping windows that are created from a set of overlapping windows, and a user can select one of the non-overlapping windows to obtain an enlarged view of that selected window while keeping the other windows in their non-overlapping state. In one embodiment, the array of non-overlapping windows can include minimized windows or windows in other virtual desktops (e.g. windows in other “Spaces”) or both. In one embodiment, only windows of a selected application are shown in non-overlapping mode while opened windows of other applications are not shown.