i'm editing my previous post: i'll be easier reading here, please answer!!!

if i set a category in K2 called "mycategory"
and i associate an extrafield group to this category
formed by three fields called "ef_1","ef_2","ef_3"
can i do following things then:

- create a menu item "ef_1" that links me to a page that show me "ef_1" value list of every or selected items???

- create a menu item "ef" that links me to a page that show me "ef_1","ef_2","ef_3" value list togheter of every or selected items???

thank for helping, please!!!

please help: i did edit my previous post: it's easier to read now, please answer!!!

This cannot be achieved by using Extra fields. From what you describe the best solution for you would be to use the tags instead.

The first menu item "ef_1" can be implemented by tags as suggested by Yiota, I'm doubt that the second one can be implemented by tags, because you can select only one tag for each menu item.

I think we need to find another workaround.