We have chosen the tiled window layout as our window organization style in order to maximize the visibility of windows for a task. People typically try to organize windows to be non-overlapping while working on a task, even when overlapping windows are allowed. Other windows are left beneath the working set of windows. As Cohen et al. In tiled layouts, hierarchies of windows can be easily represented by the borders surrounding the subwindows.
Users are quite flexible in the placement of subwindows in a group window.
There is no strict horizontal or vertical placement rule. This feature allows some flexibility in the placement of windows under the same hierarchy and allows windows to conform to their content. The content of windows is an important constraint on which users determine the shape and size of windows.