delete from ipad but not macpro

Hi all,

I would like to delete my photo's from my ipad2 but not have them automatically delete from my macpro. What settings do I need to achieve this please?

When I try it asks if I want to delete from all devices but does not give me a NO option.

I am still very new to Macbooks etc so apologise for such a dumb question.

Thanks.

Deb