Hi John,

I first have to apologize the enormous delay of my response. I was in vacation and are currently heavily busy finishing my Ph.D. thesis.

> As last time, I wasn't able to open Tutorial.lyx from
> http://wiki.lyx.org/LyX/DocumentationDevelopment either directly or by 
downloading it to my
> computer and trying to open it there.

What is the error message you get. It works for me.

Here are my suggestions for chapters 4 and 5.

Many thanks! I applied your changes except the following issues:

4.1 Math Mode

[third paragraph] Update your viewer and look at the output. [a more appropriate suggestion for a LyX user]

I merged this sentence with the next one to:
   Looking at the output you will notice that...

4.2 Navigating an Equation

[second paragraph] . . .  One thing to be careful of: if you . . . [lowercase 
is normal after a colon]

Interesting because I learned at school that the colon is equal to a dot. Both end a sentence and thus the next character must be uppercase. (This is at least the case for German and French.) I changed this nevertheless and are interested in a link to this rule for English.

4.4 The Math Toolbar

[At the end of the first paragraph, would it be worth giving a citation or 
cross-reference to where people can find this information?]

Done. The infos are available in LyX's Math manual.

4.4.4 TEX mode: Limits, log, sin and others

[I don't see the point of TEX mode here; also, in English maths, 'limits' is 
normally taken to refer to the superscripts and subscripts of integrals and the 
subscripts of sum. I suggest the heading should simply be 'Log, sin and others']

The name "limits" referred the limits function "lim". I changesd the dectiion 
heading now to:
   4.4.4 Functions: lim, log, sin and others

4.4.6 Display mode

[second paragraph] . . . in the Math Toolbar, which creates a couple of blank 
lines before and after a centered blue box. Now type an expression in the blue 
box and run or update your viewer to see how it looks. . . . [the extra 
sentence adds nothing]

I rewrote it now to:
While being in a formula, click on the display button in the Math Toolbar. This centers the formula and adds a blank line before and after it. Now type in an expression and compile your file to see how it looks.

5.2.1 TEX Mode

[third paragraph] As a special case, if you type a brace in TeX mode, then the 
beginning and ending braces will be inserted in red; the cursor will then be 
taken out of TeX mode and placed between the braces. This makes it more 
convenient to type those commands which take an argument that LyX doesn't know 
about.

The original sentence was misleading. I have now this:
As a special case, if you type “\{” in a formula, the beginning and ending braces will be inserted in red while the cursor is placed between the braces. This makes it more convenient to type those commands which take an argument.

[In the final paragraph the character between 'you want' and 'although' does 
not display in the PDF and appears to be longer than an em-dash in the LyX 
help. An em-dash would be appropriate here but maybe it needs to entered with 
--- to make it display properly in the PDF.]

This character is an em-dash and appears correctly in the PDF output (via pdflatex). My PDF viewers are GSview, Foxit, and Acrobat.

5.2.4.1 Document Class

. . . in the Class options. [I cannot see any 'Extra options']

I rewrote the complete subsection. Extra options is now named "Custom options".

best regards
Uwe

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