The main aim of bonsai aesthetic practices is to create miniature trees with an air of age in their overall shapes, proportions, and details. The quintessential bonsai is a single, dwarfed tree in a small container. It has the appearance of a mature tree, but not of a completely natural one. Instead, a designer or artist has manipulated the shape and surfaces of the tree to enhance or exaggerate the tree's apparent age, and also to give it a defined "front" from which it is meant to be viewed. Anyone questioning the effect of the bonsai designer's work can test the quality of the design by viewing it from the rear, where exactly the same trunk and branches will generally look awkward, cluttered, or otherwise unattractive.