When using a Credit Memo in the Deposit Payment page, it would be nice to be able to identify which charge(s) the amount applied is meant to offset.

For example: Client has a $1200 CM on file for pre-paid one years' rent ($100/month). Should the invoice incur variable charges, it would be nice to be able to use the CM for $100 (currently available) but be able to tell the system what it is specifically covering.