Quick question...

Is there a way to delete some of the data I have logged? So I have been logging everything with my little one for the past 8 months and I find it so useful to know where I am with nappies, feeds, naps etc. I really couldn't do without it so thank you. Anyway, I don't really need to know how many times she pooped 8 months ago anymore lol so how can I delete it all? Is there an archiving option? Thanks! Gemma