6.3.7. Unprintable characters

Inevitably, sooner or later, you will hit a very nasty problem in document processing: some characters in your file will be unprintable! They may appear in the PDF as black boxes (for example , in the OT1 font encoding), or simply wrong. Here is what you can do to solve this problem:

If you are using the OT1 font encoding[1], i.e. if your jadetex.cfg file contains the line

\usepackage[OT1]{fontenc}

then you have to enter the following characters in math mode:

• (backslash)

• FIXME

If you are using the T1 font encoding, i.e. if your jadetex.cfg file contains the line

\usepackage[T1]{fontenc}

then you can use the ae and aecompl packages in order to be able to write almost every european character:

\usepackage{ae,aecompl}

You will not, however, manage to get the two symbols, , printed correctly. If your purpose was to get the french quote characters (the “guillemets”), then you could replace the ae and aecompl packages with the aeguill package, i.e. replace the above line in jadetex.cfg with:

\usepackage{aeguill}

If your purpose was to get two signs, one after another, just as if you were describing the effect of the “append” operator in

cat file1 >> file2

then you must enter the in math mode.

Note that the above holds for the standard LyX environment (see Section 5.1) and probably all other environments where you use the same font as in the body text. You don't need to worry about characters in the code environment, probably because programming code is usually written in the ASCII encoding and LyX uses CDATA in <screen> or <programlisting> environments, where ASCII (or, maybe the value of the SP_ENCODING environment variable) is the expected input encoding for Openjade.

For more information on fonts and their encodings, see FIXME.