<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>On Dec 19, 2009, at 10:43 AM, Gary L. Gray - Forward wrote:</div><br><blockquote type="cite"><div>I may be wrong, but it is my understanding that complete editing information is preserved in the PDF files created by Illustrator. If you open one of those PDF files converted by Preview or TeXShop, you will see that the original layer structure, object structure, etc. is all gone. If you wish to edit the file later, that is important to have. Of course, if you only edit EPS files, then go with the smallest file size that still looks acceptable.<font class="Apple-style-span" color="#000000"><font class="Apple-style-span" color="#144FAE"><br></font></font></div></blockquote></div><br><div>The pdf produced by texshop remains editable in Illustrator. The particular file I used for this test contains no layers but it has text (various fonts), vector graphics and an image. You have to release the clipping mask before you can edit objects but they are editable. As soon as you save the file in AI, its size jumps to 1.8 MB (from 172 KB). Admittedly, AI gives you gazillion options when you save but I never change the defaults (I don't even know what they are).</div><div><br></div><div>Themis</div></body></html>