The package provides several macros to adjust boxed content. One purpose is to supplement the standard graphics package, which defines the macros \resizebox, \scalebox and \rotatebox , with the macros\trimbox and \clipbox. The main feature is the general \adjustbox macro which extends the “key=value” interface of \includegraphics from the graphics package and applies it to general text content. Additional provided box macros are \lapbox, \marginbox, \minsizebox, \maxsizebox and \phantombox.
All macros use the collectbox package to read the content as a box and not as a macro argument. This allows for all forms of content including special material like verbatim content. A special feature of collectbox is used to provide matching environments with the identical names as the macros.
This package is the principal package in the AMS-LaTeX distribution. It adapts for use in LaTeX most of the mathematical features found in AMS-TeX; it is a near-indispensable adjunct to serious mathematical typesetting in LaTeX.
When amsmath is loaded, AMS-LaTeX packages amsbsy (for bold symbols), amsopn (for operator names) and amstext (for text embdedded in mathematics) are also loaded.
Amsmath is part of the LaTeX required distribution; however, several contributed packages add still further to its appeal; examples are empheq, which provides functions for decorating and highlighting mathematics, and ntheorem, for specifying theorem (and similar) definitions.