Theo wrote:
thanx paul,i found this example.http://tug.org/TeXnik/list/intro.pdf but do i have to write it in the preamble or does the whole block come inside the ERT (aka TeX-button)?
You can do it list-by-list in the document body, or you can define a new environment in the preamble and then use ERT to start/end the environment (and to flag items). I'm attaching a sample document.
/Paul
spacing.lyx
Description: application/lyx