Am 08.08.2011 09:01, schrieb Jürgen Spitzmüller:

1. What is the difference between export formats LaTeX(pdflatex),
LaTeX(XeTeX) and LaTeX(LuaTeX). I know what the pdflatex variant is doing,
but what do the other variants do compared to pdflatex?

The different processors need some different LaTeX output. The most visible
ones are that XeTeX and LuaTeX need utf8 always, usually use fontspec for the
non-tex fonts (and then no inputenc and fontenc) and use polyglossia instead
of babel.

Thanks, I added these infos now.

2. We offer the export format "LyX" but that does obviously nothing and is
confusing. What is it for?

We need it to export from LyX to anything. I suppose it's only useful in the
export dialog if you use the "send to" feature (i.e. enter a command in the
dialog's lower widget).

How does the "send to" feature works? This is the first time I hear that LyX 
offers this.

3. Why is DVI(LuaTeX) in the menu but DVI(XeTeX) only in the "further
formats" section?

XeTeX does not have a DVI output format, only PDF. You should not have DVI
(XeTeX). I don't, and it's not in configure.py.

Oops, I indeed mixed this up. Sorry.

4. What does DVI(LuaTeX) and DVI(XeTeX) in contrary to DVI?

You can make a DVI (and PostScript) with LuaTeX and all its features (non-tex
fonts, real unicode etc.).

This doesn't work. I cannot even compile one of our documentation files to DVI (LuaTeX). As soon as a document contains an image, I get a LuaTeX error that the file path is not in utf8 and thus not allowed. This is now bug http://www.lyx.org/trac/ticket/7713.

5. The export formats in the "further formats" section are unsorted which
makes it hard to find a  format. How can I sort the entries?

We should sort them (trac this, please).

This is now bug http://www.lyx.org/trac/ticket/7714

6. What does DraftDVI? When I export the UserGuide to this format, the
result cannot really be  opened by DVI viewers of MiKTeX and TeXLive. I get
tons of error messages about unclear PostScript specials.

AFAIU "DraftDVI" is the normal DVI output, as produced by LaTeX, on Windows
(this export format does not exist on other OSes). Then we process this file
with a clean_dvi script to the final "DVI". This postprocessing seems to be
necessary on Windows to handle special chars in paths etc. See
http://wiki.lyx.org/LaTeX/FilesWithSpecialChars.

Thanks, I described this now.

7. What does the menu Navigate->Forward Search? I know this more or less,
but a short description  from an expert would be helpful.

If you enable forward search or "synchronize with output" in Document>
Settings, this menu item navigates the ouput file (DVI, PDF) to the place
where the cursor in the LyX window is.

I think this feature is already documented.

Yes, I found it now in sec. 5.7 of the Additional features manual

many thanks for the prompt reply and best regards
Uwe

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