unschedule-period ("unpe")

See this command in the command table.

To access this command:

Using the command line, enter "unschedule-period" and press ENTER.
Use the quick key combination "unpe".
Display the Find Command screen, locate unschedule-period and click Run.

Command Overview

Undo mining on all mined units back to specified period.

You are asked to specify a number of periods to unschedule. This number is then subtracted from the current period to give a period number from which to perform the multiple UNDO MINING.

For example, if the current period is number 8 and you enter 2 for the number of periods to unschedule then you will get the message;

All schedule data after period 6 will be erased.

Do you wish to continue ? ................ (Y/N) [Y ]:

If you accept all units mined in or after period 6 will be unmined.