In a tight housing market, how to make more of less--with instructive examples and a humdrum, marginally useful text. Bradford, an old hand at such endeavors (How to Solve Your Decorating Problems, et al.), has packed the volume with illustrations from the work of diverse designers and supplied captions explaining just what was done and why: the reader can pick up pointers and principles on the spot. You'll see the space-saving effect of white, of built-in and wall,hung units, or see-through furniture and vertical louvers. Or, more subtly, of a few light, elegant dining pieces. Though an occasional device is stagey (trompe-l'oeil windows giving on Riviera-mural views), most are time-tested decorator strategems--applied here not only to stretching any space, practically or visually, but also to creating a room within a room, making one room function for two children, and maximizing the potential of the one-room apartment. Whether one inclines toward period-eclectic or disco-modern, there are examples to suit--geared, dollar-wise, to the new householder or the inveterate re-decorator.