In the issue details, there has a simple table for subtasks list. There has only 4 column in it: Task No: title, Status, Assignee and %Done. Can I add more column into it such as 'Estimated time'?
Redmine version 2.3.1.stable
Ruby version 1.9.3 (x86_64-linux)
Rails version 3.2.13
Database adapter Mysql2