I want to separate opportunity updates that are linked to same account.

We have multiple opportunities within the same Account. I would like the individual updates for an opportunity to stay contained to that opportunity. Right now all updates for multiple opportunities under one account show up together, in other words inside the update/notes section for Opp 1 and for Opp2 for ABC account are all together. I’ve look thru the recipes of the CRM in the Opportunities board and Account boards and can not figure out to turn this off.