Exercise: Change Business Rules - How to save changed business rule in revision
This exercise has the following solution steps:
For step 10 I clicked on Business Rules (in the list on the left of the portal) then clicked on the Phone Control Parameters business rule then made the change to the Marketing Weight of the Apple iPhone.
For step 11 I couldn't find any save button so I am stuck.
This is correct. If you open a rule from the View Business Rules link, the rulke is opened in read only modus and indeed you can not save any modifications. To change a rule, you should open the rule via a change request. So ensure you first open a change request and from there the rule itself.