I am not able to view some PDF correctly.
And, after a lot of search, I found that this Problem is due to the "Preview overprinting" which must be activated.
I didn't find this Option anywhere

Momently, my Company works with the Version 5.5 (Build 315.0)
I saw, it isn't the first time this subject have been discussed on this Forum but, I have the same issue, and I nerver found up which Version this Option was added.
Could you please help me?
Thank you in advance for your Feedback
David