Dear Luis, This sample code works: \psframebox{ $ \begin{array}{rcl} aa&=&bb\\ bbb&=&bbb\\ cccc&=&ccc\\ aa&=&aa \end{array} $ } Patrice -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://tug.org/pipermail/pstricks/attachments/20161222/8de6ad5f/attachment-0001.html>