Hi, like from object, i've a new advise in pages settings (but not in all pages just in some of it):

Anyway, all seems to work fine (so, i cannot understand)...

 

Someone know this? Can try to explain if is a problem and or if is necessary to fix?

 

Thanks in advance,

S.N.

 

Come again. What is your question regarding this screenshot?

i've Write (i Know, My English is so poor, but i've Write My question) :|

 

-

Someone know this (this warning/this advice)? Can try to explain if is a problem and or if is necessary to fix?

Okay, I understand now. 
Everything is fine. You can just ignore that message. For the standard use of pages it is not important. It is not a warning, just a helpful advice for the people who know what it means. 
 

ok (it appear just in some page... not in all, and this is strange but... ok!) thank'u very much opentype