However, when image quality is critical, remember that PostScript images look better than bitmap images in PostScript and PDF files. Mathematica 's native bitmap format is platform independent. To convert an image to a Mathematica bitmap, select the image, and then select Bitmap from the Convert To option in the Cell menu. After importing a non-PostScript graphic, such as JPEG or GIF, into your notebook, convert the graphic to a Mathematica bitmap. Remove unnecessary animations.
Animations greatly increase file size.
Do not include platform-specific objects. For example, if you use Windows, do not include OLE objects in your notebook. Use a commercially released version of Mathematica Version 3 or later. The arXiv script that converts notebooks into different formats will not work with other versions. Embed either the arXiv style sheet or the default style sheet in the notebook.