# Welcome!

### Lyx: How to change the appearance of operators

I struggled a bit with changing the appearance of the operator `\Re` in Lyx. In Latex one can change its appearance by:

``\renewcommand{\Re}{\operatorname{Re}}``

But somehow it just did not work with Lyx. The reason is simple. In

``Document->Settings->Math Options``

one can select between "Use AMS Math package automatically" and "Use AMS Math package". Generally, the AMS Math package is not loaded automatically and so the `\renewcommand` doesn't work. Change this to "Use AMS Math package" and everything works just fine. I found the solution after spending a long time googleing with the help of this post: http://comments.gmane.org/gmane.editors.lyx.general/64557

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