Edit an Issue
Double click on an issue / opening it at the task pane is for editing or one click for edit in inline mode (only for subject of issue).
Also in updating mode you can add notes and time-logs, it was not accessible when you create an issue.
Other fields of the editing issue:
Issue will be created in project which was chosen in this field.
Tracker
Tracker field, defines the nature of the issue. By default, Redmine comes with three different trackers: bug, feature, and support.
You can choose the tracker you need from available to selected project.
Status
List of list of available statuses to selected project.
Display a list of all the users who are watching this issue. If the issue is updated, those users will be notified.
Display a user who are assigned on this issue. If the issue is updated, those users will be notified.
Note
In that tab you can create and send note to this issue.
Files, that was added to this issue.
Additional information to several types of data used in Redmine.