Keyboard layouts vary from manufacturer to manufacturer and even within a single manufacturers product line (compare, for example, type 4 and type 5 keyboards from Sun). This makes it difficult to describe actions that are correct for every possible keyboard. This document follows the convention established by the OSF/Motif document set in describing keys according to a model keyboard that has an ideal set of keys.
In addition to the standard letter, number and character keys, the OSF/Motif keyboard has the following special keys.
These keys are supplemented by a number of optional keys which, although useful, are either not necessary or correspond to combinations of the required keys.
If a key on the model keyboard is not available on your keyboard then there will be some combination of keys that will be equivalent to that key. A mapping between a set of actual keys and a key on the model keyboard is called a key binding. Some of the more important key bindings are listed here.