|2 About Ipe files|
Ipe 7 creates PDF files. These files can be used in any way that PDF files are used, such as viewed with a PDF viewer, edited with a PDF editor, or included in Latex/Pdflatex documents. However, Ipe cannot read arbitrary PDF files, only files it has created itself. This is because files created by Ipe contain a special hidden stream that describes the Ipe objects. (So if you edit your Ipe-generated PDF file in a different program such as Adobe Acrobat or MacOS Preview, Ipe will not be able to read the file again afterwards.)
You decide in what format to store a figure when saving it for the first time. Ipe gives you the option of saving with extensions "pdf" (PDF), and "ipe" (XML). Files saved with extension "ipe" are XML files and contain no PDF information. The precise XML format used by Ipe is documented later in this manual. XML files can be read by any XML-aware parser, and it is easy for other programs to generate XML output to be read by Ipe. You probably don't want to keep your figures in XML format, but it is excellent for communicating with other programs, and for converting figures between programs.
There are a few interesting uses for Ipe documents:
However, Ipe now comes with a presentation tool IpePresenter to make presentations more comfortable. The chapter on presentations explains Ipe features meant for making presentations.