gnumeric contitional formating howto

[Sebastien Lumineau <sebastien lumineau ac-grenoble fr>]

Hello,

Could not find answers for these 2 questions in the user manual:

1/ Is there a way to set cell format (background color for instance) under cell value condition ? 

2/ is the conditional number format syntax (such as "0_);[Red]0)" ) documented somewhere ?

Sebastien