Changing macros

I have been following a Keto diet for the last few months and have now achieved my target weight loss of just over 20kgs! Hurrah for me!

I now need to change my macros to reflect weight maintenance rather than weight loss. Is there some way of putting a line under all my current data and apply the new macros only to new entries.

Hopefully there is way as I am sure my Doctor will want to see that level of detail.

Thanks in advance.