How to set a default resolution value

 No, this only allows me to modify resolution codes.  What i am asking for is to set a default resolution code, so that when I resolve a work item the default resolution code is something of my choosing, not the default of 'Done' 

I believe I am looking for the same thing.  I would like to set a default value for the resolution (ie 'Unassigned'), which would then force the user to select a different resolution type before closing the work item (similar to how you would set an 'Unassigned Literal' value to an enumeration).  I'm finding that there are a lot of users who close an item with an incorrect resolution (because ours defaults to 'Done' as well), which skews our reports and status tracking of closed items.

Open the workflow, go to the Action table, select the action you want to set the resolution codes for,
select the resolutions in the right column, and use the up/down to order them as u want.
the topmost will appear first in the resolution code list

note that this is NOT like 'forced to pick one'..

you WILL pick one, there is no mechanism to force the user to CHANGE from the initial setting.

(all above using the Eclipse UI )

I went to https://jazz.net/jazz/web/projects/Rational%20Team%20Concert#action=com.ibm.team.workitem.viewWelcome and looked up work items containing "resolution" and found an enhancement request at the beginning of the list. I am not in the work item team,so I can't tell what their immediate plans are.