First may I compliment the chef(s), I just made my first attempt at entering a complex formula in Math as a test to see if I can use OOo for a book I'm writing on musical string calculations (working from the documentation in the Writer Guide). I bypassed the "selection window" and the "context menu" as I'd had a couple of abortive efforts with them on simple formulae - I used the Math commands reference tables to write out my formula in markup in the equation editor. My result was almost exactly what I wanted, and the only fault was because of my failure to properly close all my brackets. When I paired them right the result was perfect. This was a formula I invented as a test, it involved a reciprocal multiplying a square root of a fraction with the numerator being a quantity that was a variable to a power plus another variable over a single variable. I was impressed, the radical was sized to fit over the entire complex fraction - and the multiplier was vertically centered on the line of the fraction in the radical, as well as the equals sign and the resultant variable. Wow, I'm impressed

Pardon the preamble, but I'm quite excited about the result (I had written out the markup on a piece of paper in my armchair with a beer, not really expecting it to work). now to the question.

The purpose of numbering formulas as described in the Writer Guide isn't really clear, and it didn't work in any way for me. Pp 502/3 of the Writer Guide says to "start a new line, type fn, then hit F3". I did that (in the equation editor) and got "fn" at the end of my formula and an error message from SetPoint (which is my Logitech mouse software) that F3 was not defined. I had started the new line by hitting enter after the markup of the formula in the equation editor.

So my question is twofold. Firstly, does OOo need to be told to load function key uses to the basic system in order for them to work? I haven't fully familiarized myself with the Writer as I wanted to test the Math section first.

Secondly, the use of the formula numbering. The brief description in the Guide seems to imply that one can call a stored formula with the "fn F3", but it also seems to imply that the numbering is merely the addition of the marginal number of the formula on the line - so the later text can refer back to it. Either use is legitimate, but which is it (or both)?

Best, Jon