Choosing which rates to work with on a billing can be done via the Rate Type drop-down menu.
Default
Set by formula
Shows Matter Rate, unless no matter rate...
...then show Account Rate, unless no account rate...
...then shows Staff Rate, unless no account rate...
...then show no associated amount.
Matter Rate
Matter Rate = Amount specified in Default Rate field on Matter
Account Rate
Account Rate = Amount specified in Default Rate field on Account
Staff Rate (Timekeeper Rate)
Staff Rate = Amount specified for Timekeeper set on the billing form Timekeeper field
*Change the Timekeeper - rate amount changes to rate of newly chosen Timekeeper