Epic Time Tracking allows you to switch between using original estimates and remaining estimates to calculate the remaining time that can be logged on issues under a epic.
You have an epic with the following time tracking details:
Original estimate: 4 hours
Remaining estimate: 6 hours
This epic has a single child issue on which 3 hours of work is logged. Switching between original and remaining estimates will give the following result.
|Original Estimate||Remaining Estimate|