The Ipe Manual
The Ipe manual Otfried Cheong July 15, 2004 1 Welcome to the Wonderful World of Ipe! . where making pictures is as easy as $\pi$ ... Preparing figures for a scientific article is a time-consuming process. If you are using the LATEX document preparation system in an environment where you can include (encapsulated) Postscript figures or PDF figures, then the extendible drawing editor Ipe may be able to help you in the task. Ipe allows you to prepare and edit drawings containing a variety of basic geometry primitives like lines, splines, polygons, circles etc. Ipe also allows you to add text to your drawings, and unlike most other drawing programs, Ipe treats these text object as LATEX text. This has the advantage that all usual LATEX commands can be used within the drawing, which makes the inclusion of mathematical formulae (or even simple A labels like “qi”) much simpler. Ipe processes your LTEX source and includes its Postscript or PDF rendering in the figure. In addition, Ipe offers you some editing functions that can usually only be found in professional drawing programs or cad systems. For instance, it incorporates a context sensitive snapping mechanism, which allows you to draw objects meeting in a point, having parallel edges, objects aligned on intersection points of other objects, rectilinear and c-oriented objects and the like. Whenever one of the snapping modes is enabled, Ipe shows you Fifi, a secondary cursor, which keeps track of the current aligning. One of the nicest features of Ipe is the fact that it is extensible. You can easily write your own functions, so-called ipelets.
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